diff --git a/src/Spout/Writer/Common/Manager/ManagesCellSize.php b/src/Spout/Writer/Common/Manager/ManagesCellSize.php
index 00ac8c1..8a517f0 100644
--- a/src/Spout/Writer/Common/Manager/ManagesCellSize.php
+++ b/src/Spout/Writer/Common/Manager/ManagesCellSize.php
@@ -60,5 +60,4 @@ trait ManagesCellSize
     {
         $this->columnWidths[] = [$start, $end, $width];
     }
-
 }
diff --git a/src/Spout/Writer/Common/Manager/WorkbookManagerAbstract.php b/src/Spout/Writer/Common/Manager/WorkbookManagerAbstract.php
index 1f2331f..272484d 100644
--- a/src/Spout/Writer/Common/Manager/WorkbookManagerAbstract.php
+++ b/src/Spout/Writer/Common/Manager/WorkbookManagerAbstract.php
@@ -15,7 +15,6 @@ use Box\Spout\Writer\Common\Helper\FileSystemWithRootFolderHelperInterface;
 use Box\Spout\Writer\Common\Manager\Style\StyleManagerInterface;
 use Box\Spout\Writer\Common\Manager\Style\StyleMerger;
 use Box\Spout\Writer\Exception\SheetNotFoundException;
-use Box\Spout\Writer\Exception\WriterException;
 
 /**
  * Class WorkbookManagerAbstract
diff --git a/src/Spout/Writer/ODS/Manager/Style/StyleManager.php b/src/Spout/Writer/ODS/Manager/Style/StyleManager.php
index eabff06..32500ab 100644
--- a/src/Spout/Writer/ODS/Manager/Style/StyleManager.php
+++ b/src/Spout/Writer/ODS/Manager/Style/StyleManager.php
@@ -191,9 +191,10 @@ EOD;
 
         // Sort column widths since ODS cares about order
         usort($this->columnWidths, function ($a, $b) {
-            if ($a[0] == $b[0]) {
+            if ($a[0] === $b[0]) {
                 return 0;
             }
+
             return ($a[0] < $b[0]) ? -1 : 1;
         });
         $content .= $this->getTableColumnStylesXMLContent();
@@ -415,6 +416,7 @@ EOD;
 </style:style>
 EOD;
         }
+
         return $content;
     }
 
@@ -434,6 +436,7 @@ EOD;
         // Note: This assumes the column widths are contiguous and default width is
         // only applied to columns after the last custom column with a custom width
         $content .= '<table:table-column table:default-cell-style-name="ce1" table:style-name="default-column-style" table:number-columns-repeated="' . ($maxNumColumns - $entry[1]) . '"/>';
+
         return $content;
     }
 }
diff --git a/src/Spout/Writer/ODS/Manager/WorksheetManager.php b/src/Spout/Writer/ODS/Manager/WorksheetManager.php
index a114749..5a3ec50 100644
--- a/src/Spout/Writer/ODS/Manager/WorksheetManager.php
+++ b/src/Spout/Writer/ODS/Manager/WorksheetManager.php
@@ -102,7 +102,7 @@ class WorksheetManager implements WorksheetManagerInterface
         $escapedSheetName = $this->stringsEscaper->escape($externalSheet->getName());
         $tableStyleName = 'ta' . ($externalSheet->getIndex() + 1);
 
-        $tableElement  = '<table:table table:style-name="' . $tableStyleName . '" table:name="' . $escapedSheetName . '">';
+        $tableElement = '<table:table table:style-name="' . $tableStyleName . '" table:name="' . $escapedSheetName . '">';
         $tableElement .= $this->styleManager->getStyledTableColumnXMLContent($worksheet->getMaxNumColumns());
 
         return $tableElement;
diff --git a/src/Spout/Writer/WriterMultiSheetsAbstract.php b/src/Spout/Writer/WriterMultiSheetsAbstract.php
index 77d58d8..b349b04 100644
--- a/src/Spout/Writer/WriterMultiSheetsAbstract.php
+++ b/src/Spout/Writer/WriterMultiSheetsAbstract.php
@@ -57,8 +57,10 @@ abstract class WriterMultiSheetsAbstract extends WriterAbstract
     {
         $this->throwIfWriterAlreadyOpened('Writer must be configured before opening it.');
 
-        $this->optionsManager->setOption(Options::SHOULD_CREATE_NEW_SHEETS_AUTOMATICALLY,
-            $shouldCreateNewSheetsAutomatically);
+        $this->optionsManager->setOption(
+            Options::SHOULD_CREATE_NEW_SHEETS_AUTOMATICALLY,
+            $shouldCreateNewSheetsAutomatically
+        );
 
         return $this;
     }
@@ -77,8 +79,8 @@ abstract class WriterMultiSheetsAbstract extends WriterAbstract
     /**
      * Returns all the workbook's sheets
      *
-     * @return Sheet[] All the workbook's sheets
      * @throws WriterNotOpenedException If the writer has not been opened yet
+     * @return Sheet[] All the workbook's sheets
      */
     public function getSheets()
     {
diff --git a/src/Spout/Writer/XLSX/Manager/WorksheetManager.php b/src/Spout/Writer/XLSX/Manager/WorksheetManager.php
index 1d19f47..e430b3c 100644
--- a/src/Spout/Writer/XLSX/Manager/WorksheetManager.php
+++ b/src/Spout/Writer/XLSX/Manager/WorksheetManager.php
@@ -232,7 +232,7 @@ EOD;
         if ($cell->isString()) {
             $cellXML .= $this->getCellXMLFragmentForNonEmptyString($cell->getValue());
         } elseif ($cell->isBoolean()) {
-            $cellXML .= ' t="b"><v>' . (int)($cell->getValue()) . '</v></c>';
+            $cellXML .= ' t="b"><v>' . (int) ($cell->getValue()) . '</v></c>';
         } elseif ($cell->isNumeric()) {
             $cellXML .= '><v>' . $cell->getValue() . '</v></c>';
         } elseif ($cell->isError() && is_string($cell->getValueEvenIfError())) {
@@ -291,6 +291,7 @@ EOD;
             $xml .= '<col min="' . $entry[0] . '" max="' . $entry[1] . '" width="' . $entry[2] . '" customWidth="true"/>';
         }
         $xml .= '</cols>';
+
         return $xml;
     }
 
@@ -308,6 +309,7 @@ EOD;
         }
         // Ensure that the required defaultRowHeight is set
         $rowHeightXml = empty($rowHeightXml) ? ' defaultRowHeight="0"' : $rowHeightXml;
+
         return "<sheetFormatPr{$colWidthXml}{$rowHeightXml}/>";
     }