diff --git a/.gitignore b/.gitignore
index 2760edd..68715b4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,5 @@
 /tests/resources/generated
 /tests/coverage
 /vendor
-composer.lock
 /.idea
 *.iml
diff --git a/.scrutinizer.yml b/.scrutinizer.yml
new file mode 100644
index 0000000..9794aff
--- /dev/null
+++ b/.scrutinizer.yml
@@ -0,0 +1,54 @@
+filter:
+    excluded_paths: [vendor/*, tests/*]
+
+tools:
+    external_code_coverage:
+        timeout: 600 # Wait 10 minutes for results
+        runs: 3 # Merge results for 5.4, 5.5 and 5.6 jobs
+    php_mess_detector: true
+    php_code_sniffer:
+        config:
+            standard: PSR4
+        filter:
+            paths: ['src']
+    sensiolabs_security_checker: true
+    php_pdepend: true
+    php_loc:
+        enabled: true
+        excluded_dirs: [vendor, tests]
+    php_cpd:
+        enabled: true
+        excluded_dirs: [vendor, tests]
+
+build_failure_conditions:
+    - 'project.metric("scrutinizer.quality", < 9)' # Code Quality Rating drops below 9
+    - 'project.metric_change("scrutinizer.test_coverage", < -0.005)' # Code Coverage decreased by more than 0.5%
+    - 'project.metric("scrutinizer.test_coverage", < 0.97)' # Code Coverage drops below 97%
+
+checks:
+    php:
+        remove_extra_empty_lines: true
+        remove_php_closing_tag: true
+        remove_trailing_whitespace: true
+        fix_use_statements:
+            remove_unused: true
+            preserve_multiple: false
+            preserve_blanklines: true
+        fix_php_opening_tag: true
+        fix_linefeed: true
+        fix_line_ending: true
+        fix_identation_4spaces: true
+        fix_doc_comments: true
+        uppercase_constants: true
+        use_self_instead_of_fqcn: true
+        simplify_boolean_return: true
+        return_doc_comments: true
+        return_doc_comment_if_not_inferrable: true
+        phpunit_assertions: true
+        parameters_in_camelcaps: true
+        parameter_doc_comments: true
+        param_doc_comment_if_not_inferrable: true
+        optional_parameters_at_the_end: true
+        newline_at_end_of_file: true
+        encourage_single_quotes: true
+
diff --git a/.travis.yml b/.travis.yml
index 6014a8b..d4306c9 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,15 +4,15 @@ php:
   - 5.4
   - 5.5
   - 5.6
-  - nightly
+  - 7.0
   - hhvm
 
 install:
-  - composer install --no-interaction
+  - composer install --no-interaction --prefer-source
 
 script:
   - mkdir -p build/logs
   - php vendor/bin/phpunit --coverage-clover build/logs/clover.xml
 
 after_script:
-  - php vendor/bin/coveralls -v
+  - if [[ $TRAVIS_PHP_VERSION != 'hhvm' && $TRAVIS_PHP_VERSION != '7.0' ]]; then php vendor/bin/ocular code-coverage:upload --format=php-clover build/logs/clover.xml; fi
diff --git a/README.md b/README.md
index 9f82626..6686a2b 100644
--- a/README.md
+++ b/README.md
@@ -3,7 +3,7 @@
 [![Latest Stable Version](https://poser.pugx.org/box/spout/v/stable)](https://packagist.org/packages/box/spout)
 [![Project Status](http://opensource.box.com/badges/active.svg)](http://opensource.box.com/badges)
 [![Build Status](https://travis-ci.org/box/spout.png?branch=master)](http://travis-ci.org/box/spout)
-[![Coverage Status](https://coveralls.io/repos/box/spout/badge.svg?branch=master)](https://coveralls.io/r/box/spout?branch=master)
+[![Code Coverage](https://scrutinizer-ci.com/g/box/spout/badges/coverage.png?b=master)](https://scrutinizer-ci.com/g/box/spout/?branch=master)
 [![Total Downloads](https://poser.pugx.org/box/spout/downloads)](https://packagist.org/packages/box/spout)
 [![License](https://poser.pugx.org/box/spout/license)](https://packagist.org/packages/box/spout)
 
diff --git a/composer.json b/composer.json
index 4ef34f6..a08d6bf 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
     },
     "require-dev": {
         "phpunit/phpunit": ">=3.7",
-        "satooshi/php-coveralls": "^0.6.1"
+        "scrutinizer/ocular": "~1.1"
     },
     "autoload": {
         "psr-4": {
diff --git a/composer.lock b/composer.lock
new file mode 100644
index 0000000..b06d00f
--- /dev/null
+++ b/composer.lock
@@ -0,0 +1,1647 @@
+{
+    "_readme": [
+        "This file locks the dependencies of your project to a known state",
+        "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#composer-lock-the-lock-file",
+        "This file is @generated automatically"
+    ],
+    "hash": "3c0d36250693792d14bc19f14250fec6",
+    "packages": [],
+    "packages-dev": [
+        {
+            "name": "doctrine/annotations",
+            "version": "v1.2.6",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/doctrine/annotations.git",
+                "reference": "f4a91702ca3cd2e568c3736aa031ed00c3752af4"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/doctrine/annotations/zipball/f4a91702ca3cd2e568c3736aa031ed00c3752af4",
+                "reference": "f4a91702ca3cd2e568c3736aa031ed00c3752af4",
+                "shasum": ""
+            },
+            "require": {
+                "doctrine/lexer": "1.*",
+                "php": ">=5.3.2"
+            },
+            "require-dev": {
+                "doctrine/cache": "1.*",
+                "phpunit/phpunit": "4.*"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.3.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "Doctrine\\Common\\Annotations\\": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Roman Borschel",
+                    "email": "roman@code-factory.org"
+                },
+                {
+                    "name": "Benjamin Eberlei",
+                    "email": "kontakt@beberlei.de"
+                },
+                {
+                    "name": "Guilherme Blanco",
+                    "email": "guilhermeblanco@gmail.com"
+                },
+                {
+                    "name": "Jonathan Wage",
+                    "email": "jonwage@gmail.com"
+                },
+                {
+                    "name": "Johannes Schmitt",
+                    "email": "schmittjoh@gmail.com"
+                }
+            ],
+            "description": "Docblock Annotations Parser",
+            "homepage": "http://www.doctrine-project.org",
+            "keywords": [
+                "annotations",
+                "docblock",
+                "parser"
+            ],
+            "time": "2015-06-17 12:21:22"
+        },
+        {
+            "name": "doctrine/instantiator",
+            "version": "1.0.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/doctrine/instantiator.git",
+                "reference": "8e884e78f9f0eb1329e445619e04456e64d8051d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/8e884e78f9f0eb1329e445619e04456e64d8051d",
+                "reference": "8e884e78f9f0eb1329e445619e04456e64d8051d",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3,<8.0-DEV"
+            },
+            "require-dev": {
+                "athletic/athletic": "~0.1.8",
+                "ext-pdo": "*",
+                "ext-phar": "*",
+                "phpunit/phpunit": "~4.0",
+                "squizlabs/php_codesniffer": "~2.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Doctrine\\Instantiator\\": "src/Doctrine/Instantiator/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Marco Pivetta",
+                    "email": "ocramius@gmail.com",
+                    "homepage": "http://ocramius.github.com/"
+                }
+            ],
+            "description": "A small, lightweight utility to instantiate objects in PHP without invoking their constructors",
+            "homepage": "https://github.com/doctrine/instantiator",
+            "keywords": [
+                "constructor",
+                "instantiate"
+            ],
+            "time": "2015-06-14 21:17:01"
+        },
+        {
+            "name": "doctrine/lexer",
+            "version": "v1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/doctrine/lexer.git",
+                "reference": "83893c552fd2045dd78aef794c31e694c37c0b8c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/doctrine/lexer/zipball/83893c552fd2045dd78aef794c31e694c37c0b8c",
+                "reference": "83893c552fd2045dd78aef794c31e694c37c0b8c",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.2"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "Doctrine\\Common\\Lexer\\": "lib/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Roman Borschel",
+                    "email": "roman@code-factory.org"
+                },
+                {
+                    "name": "Guilherme Blanco",
+                    "email": "guilhermeblanco@gmail.com"
+                },
+                {
+                    "name": "Johannes Schmitt",
+                    "email": "schmittjoh@gmail.com"
+                }
+            ],
+            "description": "Base library for a lexer that can be used in Top-Down, Recursive Descent Parsers.",
+            "homepage": "http://www.doctrine-project.org",
+            "keywords": [
+                "lexer",
+                "parser"
+            ],
+            "time": "2014-09-09 13:34:57"
+        },
+        {
+            "name": "guzzle/guzzle",
+            "version": "v3.9.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/guzzle/guzzle3.git",
+                "reference": "0645b70d953bc1c067bbc8d5bc53194706b628d9"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/guzzle/guzzle3/zipball/0645b70d953bc1c067bbc8d5bc53194706b628d9",
+                "reference": "0645b70d953bc1c067bbc8d5bc53194706b628d9",
+                "shasum": ""
+            },
+            "require": {
+                "ext-curl": "*",
+                "php": ">=5.3.3",
+                "symfony/event-dispatcher": "~2.1"
+            },
+            "replace": {
+                "guzzle/batch": "self.version",
+                "guzzle/cache": "self.version",
+                "guzzle/common": "self.version",
+                "guzzle/http": "self.version",
+                "guzzle/inflection": "self.version",
+                "guzzle/iterator": "self.version",
+                "guzzle/log": "self.version",
+                "guzzle/parser": "self.version",
+                "guzzle/plugin": "self.version",
+                "guzzle/plugin-async": "self.version",
+                "guzzle/plugin-backoff": "self.version",
+                "guzzle/plugin-cache": "self.version",
+                "guzzle/plugin-cookie": "self.version",
+                "guzzle/plugin-curlauth": "self.version",
+                "guzzle/plugin-error-response": "self.version",
+                "guzzle/plugin-history": "self.version",
+                "guzzle/plugin-log": "self.version",
+                "guzzle/plugin-md5": "self.version",
+                "guzzle/plugin-mock": "self.version",
+                "guzzle/plugin-oauth": "self.version",
+                "guzzle/service": "self.version",
+                "guzzle/stream": "self.version"
+            },
+            "require-dev": {
+                "doctrine/cache": "~1.3",
+                "monolog/monolog": "~1.0",
+                "phpunit/phpunit": "3.7.*",
+                "psr/log": "~1.0",
+                "symfony/class-loader": "~2.1",
+                "zendframework/zend-cache": "2.*,<2.3",
+                "zendframework/zend-log": "2.*,<2.3"
+            },
+            "suggest": {
+                "guzzlehttp/guzzle": "Guzzle 5 has moved to a new package name. The package you have installed, Guzzle 3, is deprecated."
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "3.9-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "Guzzle": "src/",
+                    "Guzzle\\Tests": "tests/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Michael Dowling",
+                    "email": "mtdowling@gmail.com",
+                    "homepage": "https://github.com/mtdowling"
+                },
+                {
+                    "name": "Guzzle Community",
+                    "homepage": "https://github.com/guzzle/guzzle/contributors"
+                }
+            ],
+            "description": "PHP HTTP client. This library is deprecated in favor of https://packagist.org/packages/guzzlehttp/guzzle",
+            "homepage": "http://guzzlephp.org/",
+            "keywords": [
+                "client",
+                "curl",
+                "framework",
+                "http",
+                "http client",
+                "rest",
+                "web service"
+            ],
+            "time": "2015-03-18 18:23:50"
+        },
+        {
+            "name": "jms/metadata",
+            "version": "1.5.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/schmittjoh/metadata.git",
+                "reference": "22b72455559a25777cfd28c4ffda81ff7639f353"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/schmittjoh/metadata/zipball/22b72455559a25777cfd28c4ffda81ff7639f353",
+                "reference": "22b72455559a25777cfd28c4ffda81ff7639f353",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.0"
+            },
+            "require-dev": {
+                "doctrine/cache": "~1.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.5.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "Metadata\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "Apache"
+            ],
+            "authors": [
+                {
+                    "name": "Johannes Schmitt",
+                    "email": "schmittjoh@gmail.com",
+                    "homepage": "https://github.com/schmittjoh",
+                    "role": "Developer of wrapped JMSSerializerBundle"
+                }
+            ],
+            "description": "Class/method/property metadata management in PHP",
+            "keywords": [
+                "annotations",
+                "metadata",
+                "xml",
+                "yaml"
+            ],
+            "time": "2014-07-12 07:13:19"
+        },
+        {
+            "name": "jms/parser-lib",
+            "version": "1.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/schmittjoh/parser-lib.git",
+                "reference": "c509473bc1b4866415627af0e1c6cc8ac97fa51d"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/schmittjoh/parser-lib/zipball/c509473bc1b4866415627af0e1c6cc8ac97fa51d",
+                "reference": "c509473bc1b4866415627af0e1c6cc8ac97fa51d",
+                "shasum": ""
+            },
+            "require": {
+                "phpoption/phpoption": ">=0.9,<2.0-dev"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "JMS\\": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "Apache2"
+            ],
+            "description": "A library for easily creating recursive-descent parsers.",
+            "time": "2012-11-18 18:08:43"
+        },
+        {
+            "name": "jms/serializer",
+            "version": "0.16.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/schmittjoh/serializer.git",
+                "reference": "c8a171357ca92b6706e395c757f334902d430ea9"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/schmittjoh/serializer/zipball/c8a171357ca92b6706e395c757f334902d430ea9",
+                "reference": "c8a171357ca92b6706e395c757f334902d430ea9",
+                "shasum": ""
+            },
+            "require": {
+                "doctrine/annotations": "1.*",
+                "jms/metadata": "~1.1",
+                "jms/parser-lib": "1.*",
+                "php": ">=5.3.2",
+                "phpcollection/phpcollection": "~0.1"
+            },
+            "require-dev": {
+                "doctrine/orm": "~2.1",
+                "doctrine/phpcr-odm": "~1.0.1",
+                "jackalope/jackalope-doctrine-dbal": "1.0.*",
+                "propel/propel1": "~1.7",
+                "symfony/filesystem": "2.*",
+                "symfony/form": "~2.1",
+                "symfony/translation": "~2.0",
+                "symfony/validator": "~2.0",
+                "symfony/yaml": "2.*",
+                "twig/twig": ">=1.8,<2.0-dev"
+            },
+            "suggest": {
+                "symfony/yaml": "Required if you'd like to serialize data to YAML format."
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "0.15-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "JMS\\Serializer": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "Apache2"
+            ],
+            "authors": [
+                {
+                    "name": "Johannes Schmitt",
+                    "email": "schmittjoh@gmail.com",
+                    "homepage": "https://github.com/schmittjoh",
+                    "role": "Developer of wrapped JMSSerializerBundle"
+                }
+            ],
+            "description": "Library for (de-)serializing data of any complexity; supports XML, JSON, and YAML.",
+            "homepage": "http://jmsyst.com/libs/serializer",
+            "keywords": [
+                "deserialization",
+                "jaxb",
+                "json",
+                "serialization",
+                "xml"
+            ],
+            "time": "2014-03-18 08:39:00"
+        },
+        {
+            "name": "phpcollection/phpcollection",
+            "version": "0.4.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/schmittjoh/php-collection.git",
+                "reference": "b8bf55a0a929ca43b01232b36719f176f86c7e83"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/schmittjoh/php-collection/zipball/b8bf55a0a929ca43b01232b36719f176f86c7e83",
+                "reference": "b8bf55a0a929ca43b01232b36719f176f86c7e83",
+                "shasum": ""
+            },
+            "require": {
+                "phpoption/phpoption": "1.*"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "0.3-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "PhpCollection": "src/"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "Apache2"
+            ],
+            "authors": [
+                {
+                    "name": "Johannes Schmitt",
+                    "email": "schmittjoh@gmail.com",
+                    "homepage": "https://github.com/schmittjoh",
+                    "role": "Developer of wrapped JMSSerializerBundle"
+                }
+            ],
+            "description": "General-Purpose Collection Library for PHP",
+            "keywords": [
+                "collection",
+                "list",
+                "map",
+                "sequence",
+                "set"
+            ],
+            "time": "2014-03-11 13:46:42"
+        },
+        {
+            "name": "phpdocumentor/reflection-docblock",
+            "version": "2.0.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/phpDocumentor/ReflectionDocBlock.git",
+                "reference": "d68dbdc53dc358a816f00b300704702b2eaff7b8"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/phpDocumentor/ReflectionDocBlock/zipball/d68dbdc53dc358a816f00b300704702b2eaff7b8",
+                "reference": "d68dbdc53dc358a816f00b300704702b2eaff7b8",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~4.0"
+            },
+            "suggest": {
+                "dflydev/markdown": "~1.0",
+                "erusev/parsedown": "~1.0"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.0.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-0": {
+                    "phpDocumentor": [
+                        "src/"
+                    ]
+                }
+            },
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+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Provides functionality to handle HHVM/PHP environments",
+            "homepage": "http://www.github.com/sebastianbergmann/environment",
+            "keywords": [
+                "Xdebug",
+                "environment",
+                "hhvm"
+            ],
+            "time": "2015-07-26 06:42:57"
+        },
+        {
+            "name": "sebastian/exporter",
+            "version": "1.2.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/exporter.git",
+                "reference": "7ae5513327cb536431847bcc0c10edba2701064e"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/exporter/zipball/7ae5513327cb536431847bcc0c10edba2701064e",
+                "reference": "7ae5513327cb536431847bcc0c10edba2701064e",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3",
+                "sebastian/recursion-context": "~1.0"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~4.4"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.2.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Jeff Welch",
+                    "email": "whatthejeff@gmail.com"
+                },
+                {
+                    "name": "Volker Dusch",
+                    "email": "github@wallbash.com"
+                },
+                {
+                    "name": "Bernhard Schussek",
+                    "email": "bschussek@2bepublished.at"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                },
+                {
+                    "name": "Adam Harvey",
+                    "email": "aharvey@php.net"
+                }
+            ],
+            "description": "Provides the functionality to export PHP variables for visualization",
+            "homepage": "http://www.github.com/sebastianbergmann/exporter",
+            "keywords": [
+                "export",
+                "exporter"
+            ],
+            "time": "2015-06-21 07:55:53"
+        },
+        {
+            "name": "sebastian/global-state",
+            "version": "1.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/global-state.git",
+                "reference": "c7428acdb62ece0a45e6306f1ae85e1c05b09c01"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/global-state/zipball/c7428acdb62ece0a45e6306f1ae85e1c05b09c01",
+                "reference": "c7428acdb62ece0a45e6306f1ae85e1c05b09c01",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~4.2"
+            },
+            "suggest": {
+                "ext-uopz": "*"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                }
+            ],
+            "description": "Snapshotting of global state",
+            "homepage": "http://www.github.com/sebastianbergmann/global-state",
+            "keywords": [
+                "global state"
+            ],
+            "time": "2014-10-06 09:23:50"
+        },
+        {
+            "name": "sebastian/recursion-context",
+            "version": "1.0.1",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/recursion-context.git",
+                "reference": "994d4a811bafe801fb06dccbee797863ba2792ba"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/recursion-context/zipball/994d4a811bafe801fb06dccbee797863ba2792ba",
+                "reference": "994d4a811bafe801fb06dccbee797863ba2792ba",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.3"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "~4.4"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.0.x-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Jeff Welch",
+                    "email": "whatthejeff@gmail.com"
+                },
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de"
+                },
+                {
+                    "name": "Adam Harvey",
+                    "email": "aharvey@php.net"
+                }
+            ],
+            "description": "Provides functionality to recursively process PHP variables",
+            "homepage": "http://www.github.com/sebastianbergmann/recursion-context",
+            "time": "2015-06-21 08:04:50"
+        },
+        {
+            "name": "sebastian/version",
+            "version": "1.0.6",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/version.git",
+                "reference": "58b3a85e7999757d6ad81c787a1fbf5ff6c628c6"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/version/zipball/58b3a85e7999757d6ad81c787a1fbf5ff6c628c6",
+                "reference": "58b3a85e7999757d6ad81c787a1fbf5ff6c628c6",
+                "shasum": ""
+            },
+            "type": "library",
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Library that helps with managing the version number of Git-hosted PHP projects",
+            "homepage": "https://github.com/sebastianbergmann/version",
+            "time": "2015-06-21 13:59:46"
+        },
+        {
+            "name": "symfony/console",
+            "version": "v2.7.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/Console.git",
+                "reference": "8cf484449130cabfd98dcb4694ca9945802a21ed"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/Console/zipball/8cf484449130cabfd98dcb4694ca9945802a21ed",
+                "reference": "8cf484449130cabfd98dcb4694ca9945802a21ed",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.9"
+            },
+            "require-dev": {
+                "psr/log": "~1.0",
+                "symfony/event-dispatcher": "~2.1",
+                "symfony/phpunit-bridge": "~2.7",
+                "symfony/process": "~2.1"
+            },
+            "suggest": {
+                "psr/log": "For using the console logger",
+                "symfony/event-dispatcher": "",
+                "symfony/process": ""
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.7-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\Console\\": ""
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony Console Component",
+            "homepage": "https://symfony.com",
+            "time": "2015-07-09 16:07:40"
+        },
+        {
+            "name": "symfony/event-dispatcher",
+            "version": "v2.7.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/EventDispatcher.git",
+                "reference": "9310b5f9a87ec2ea75d20fec0b0017c77c66dac3"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/EventDispatcher/zipball/9310b5f9a87ec2ea75d20fec0b0017c77c66dac3",
+                "reference": "9310b5f9a87ec2ea75d20fec0b0017c77c66dac3",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.9"
+            },
+            "require-dev": {
+                "psr/log": "~1.0",
+                "symfony/config": "~2.0,>=2.0.5",
+                "symfony/dependency-injection": "~2.6",
+                "symfony/expression-language": "~2.6",
+                "symfony/phpunit-bridge": "~2.7",
+                "symfony/stopwatch": "~2.3"
+            },
+            "suggest": {
+                "symfony/dependency-injection": "",
+                "symfony/http-kernel": ""
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.7-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\EventDispatcher\\": ""
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony EventDispatcher Component",
+            "homepage": "https://symfony.com",
+            "time": "2015-06-18 19:21:56"
+        },
+        {
+            "name": "symfony/process",
+            "version": "v2.7.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/Process.git",
+                "reference": "48aeb0e48600321c272955132d7606ab0a49adb3"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/Process/zipball/48aeb0e48600321c272955132d7606ab0a49adb3",
+                "reference": "48aeb0e48600321c272955132d7606ab0a49adb3",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.9"
+            },
+            "require-dev": {
+                "symfony/phpunit-bridge": "~2.7"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.7-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\Process\\": ""
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony Process Component",
+            "homepage": "https://symfony.com",
+            "time": "2015-07-01 11:25:50"
+        },
+        {
+            "name": "symfony/yaml",
+            "version": "v2.7.2",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/symfony/Yaml.git",
+                "reference": "4bfbe0ed3909bfddd75b70c094391ec1f142f860"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/symfony/Yaml/zipball/4bfbe0ed3909bfddd75b70c094391ec1f142f860",
+                "reference": "4bfbe0ed3909bfddd75b70c094391ec1f142f860",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=5.3.9"
+            },
+            "require-dev": {
+                "symfony/phpunit-bridge": "~2.7"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "2.7-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Symfony\\Component\\Yaml\\": ""
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
+                },
+                {
+                    "name": "Symfony Community",
+                    "homepage": "https://symfony.com/contributors"
+                }
+            ],
+            "description": "Symfony Yaml Component",
+            "homepage": "https://symfony.com",
+            "time": "2015-07-01 11:25:50"
+        }
+    ],
+    "aliases": [],
+    "minimum-stability": "stable",
+    "stability-flags": [],
+    "prefer-stable": false,
+    "prefer-lowest": false,
+    "platform": {
+        "php": ">=5.4.0",
+        "ext-zip": "*",
+        "ext-xmlreader": "*",
+        "ext-simplexml": "*"
+    },
+    "platform-dev": []
+}
diff --git a/src/Spout/Autoloader/Psr4Autoloader.php b/src/Spout/Autoloader/Psr4Autoloader.php
index 649a732..67cccc3 100644
--- a/src/Spout/Autoloader/Psr4Autoloader.php
+++ b/src/Spout/Autoloader/Psr4Autoloader.php
@@ -32,20 +32,20 @@ class Psr4Autoloader
      * Adds a base directory for a namespace prefix.
      *
      * @param string $prefix The namespace prefix.
-     * @param string $base_dir A base directory for class files in the
+     * @param string $baseDir A base directory for class files in the
      * namespace.
      * @param bool $prepend If true, prepend the base directory to the stack
      * instead of appending it; this causes it to be searched first rather
      * than last.
      * @return void
      */
-    public function addNamespace($prefix, $base_dir, $prepend = false)
+    public function addNamespace($prefix, $baseDir, $prepend = false)
     {
         // normalize namespace prefix
         $prefix = trim($prefix, '\\') . '\\';
 
         // normalize the base directory with a trailing separator
-        $base_dir = rtrim($base_dir, DIRECTORY_SEPARATOR) . '/';
+        $baseDir = rtrim($baseDir, DIRECTORY_SEPARATOR) . '/';
 
         // initialize the namespace prefix array
         if (isset($this->prefixes[$prefix]) === false) {
@@ -54,9 +54,9 @@ class Psr4Autoloader
 
         // retain the base directory for the namespace prefix
         if ($prepend) {
-            array_unshift($this->prefixes[$prefix], $base_dir);
+            array_unshift($this->prefixes[$prefix], $baseDir);
         } else {
-            array_push($this->prefixes[$prefix], $base_dir);
+            array_push($this->prefixes[$prefix], $baseDir);
         }
     }
 
@@ -80,12 +80,12 @@ class Psr4Autoloader
             $prefix = substr($class, 0, $pos + 1);
 
             // the rest is the relative class name
-            $relative_class = substr($class, $pos + 1);
+            $relativeClass = substr($class, $pos + 1);
 
             // try to load a mapped file for the prefix and relative class
-            $mapped_file = $this->loadMappedFile($prefix, $relative_class);
-            if ($mapped_file) {
-                return $mapped_file;
+            $mappedFile = $this->loadMappedFile($prefix, $relativeClass);
+            if ($mappedFile !== false) {
+                return $mappedFile;
             }
 
             // remove the trailing namespace separator for the next iteration
@@ -101,11 +101,11 @@ class Psr4Autoloader
      * Load the mapped file for a namespace prefix and relative class.
      *
      * @param string $prefix The namespace prefix.
-     * @param string $relative_class The relative class name.
+     * @param string $relativeClass The relative class name.
      * @return mixed Boolean false if no mapped file can be loaded, or the
      * name of the mapped file that was loaded.
      */
-    protected function loadMappedFile($prefix, $relative_class)
+    protected function loadMappedFile($prefix, $relativeClass)
     {
         // are there any base directories for this namespace prefix?
         if (isset($this->prefixes[$prefix]) === false) {
@@ -113,13 +113,13 @@ class Psr4Autoloader
         }
 
         // look through base directories for this namespace prefix
-        foreach ($this->prefixes[$prefix] as $base_dir) {
+        foreach ($this->prefixes[$prefix] as $baseDir) {
 
             // replace the namespace prefix with the base directory,
             // replace namespace separators with directory separators
             // in the relative class name, append with .php
-            $file = $base_dir
-                  . str_replace('\\', '/', $relative_class)
+            $file = $baseDir
+                  . str_replace('\\', '/', $relativeClass)
                   . '.php';
 
             // if the mapped file exists, require it