Introduce an options manager for all writers (#423)

This will improve the management of options and simplify some methods' signatures.
This commit will also help moving the code to a better state regarding Dependency Injection.

src/Spout/Writer/CSV/Manager/OptionsManager.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace Box\Spout\Writer\CSV\Manager;
+
+use Box\Spout\Writer\Common\Options;
+
+/**
+ * Class OptionsManager
+ * CSV Writer options manager
+ *
+ * @package Box\Spout\Writer\CSV\Manager
+ */
+class OptionsManager extends \Box\Spout\Writer\Common\Manager\OptionsManager
+{
+    /**
+     * @inheritdoc
+     */
+    protected function getSupportedOptions()
+    {
+        return [
+            Options::FIELD_DELIMITER,
+            Options::FIELD_ENCLOSURE,
+            Options::SHOULD_ADD_BOM,
+        ];
+    }
+
+    /**
+     * @inheritdoc
+     */
+    protected function setDefaultOptions()
+    {
+        $this->setOption(Options::FIELD_DELIMITER, ',');
+        $this->setOption(Options::FIELD_ENCLOSURE, '"');
+        $this->setOption(Options::SHOULD_ADD_BOM, true);
+    }
+}