diff --git a/src/Spout/Reader/CSV/Creator/InternalEntityFactory.php b/src/Spout/Reader/CSV/Creator/InternalEntityFactory.php
index d0b9114..f4e3c53 100644
--- a/src/Spout/Reader/CSV/Creator/InternalEntityFactory.php
+++ b/src/Spout/Reader/CSV/Creator/InternalEntityFactory.php
@@ -65,6 +65,24 @@ class InternalEntityFactory implements InternalEntityFactoryInterface
         return new RowIterator($filePointer, $optionsManager, $encodingHelper, $this, $globalFunctionsHelper);
     }
 
+    /**
+     * @param Cell[] $cells
+     * @return Row
+     */
+    public function createRow(array $cells = [])
+    {
+        return new Row($cells);
+    }
+
+    /**
+     * @param mixed $cellValue
+     * @return Cell
+     */
+    public function createCell($cellValue)
+    {
+        return new Cell($cellValue);
+    }
+
     /**
      * @param array $cellValues
      * @return Row
@@ -72,9 +90,9 @@ class InternalEntityFactory implements InternalEntityFactoryInterface
     public function createRowFromArray(array $cellValues = [])
     {
         $cells = array_map(function ($cellValue) {
-            return new Cell($cellValue);
+            return $this->createCell($cellValue);
         }, $cellValues);
 
-        return new Row($cells);
+        return $this->createRow($cells);
     }
 }
diff --git a/src/Spout/Reader/Common/Creator/InternalEntityFactoryInterface.php b/src/Spout/Reader/Common/Creator/InternalEntityFactoryInterface.php
index 1df1c1e..9f9fd04 100644
--- a/src/Spout/Reader/Common/Creator/InternalEntityFactoryInterface.php
+++ b/src/Spout/Reader/Common/Creator/InternalEntityFactoryInterface.php
@@ -2,9 +2,23 @@
 
 namespace Box\Spout\Reader\Common\Creator;
 
+use Box\Spout\Reader\Common\Entity\Cell;
+use Box\Spout\Reader\Common\Entity\Row;
+
 /**
  * Interface EntityFactoryInterface
  */
 interface InternalEntityFactoryInterface
 {
+    /**
+     * @param Cell[] $cells
+     * @return Row
+     */
+    public function createRow(array $cells = []);
+
+    /**
+     * @param mixed $cellValue
+     * @return Cell
+     */
+    public function createCell($cellValue);
 }
diff --git a/src/Spout/Reader/Common/Entity/Row.php b/src/Spout/Reader/Common/Entity/Row.php
index a63414a..84ff56e 100644
--- a/src/Spout/Reader/Common/Entity/Row.php
+++ b/src/Spout/Reader/Common/Entity/Row.php
@@ -65,6 +65,14 @@ class Row
         return $this;
     }
 
+    /**
+     * @return int
+     */
+    public function getNumCells()
+    {
+        return count($this->cells);
+    }
+
     /**
      * @return array The row values, as array
      */
diff --git a/src/Spout/Reader/XLSX/Manager/RowManager.php b/src/Spout/Reader/Common/Manager/RowManager.php
similarity index 74%
rename from src/Spout/Reader/XLSX/Manager/RowManager.php
rename to src/Spout/Reader/Common/Manager/RowManager.php
index ec85bdc..f0b55ff 100644
--- a/src/Spout/Reader/XLSX/Manager/RowManager.php
+++ b/src/Spout/Reader/Common/Manager/RowManager.php
@@ -1,22 +1,22 @@
 <?php
 
-namespace Box\Spout\Reader\XLSX\Manager;
+namespace Box\Spout\Reader\Common\Manager;
 
+use Box\Spout\Reader\Common\Creator\InternalEntityFactoryInterface;
 use Box\Spout\Reader\Common\Entity\Row;
-use Box\Spout\Reader\XLSX\Creator\InternalEntityFactory;
 
 /**
  * Class RowManager
  */
 class RowManager
 {
-    /** @var InternalEntityFactory Factory to create entities */
+    /** @var InternalEntityFactoryInterface Factory to create entities */
     private $entityFactory;
 
     /**
-     * @param InternalEntityFactory $entityFactory Factory to create entities
+     * @param InternalEntityFactoryInterface $entityFactory Factory to create entities
      */
-    public function __construct(InternalEntityFactory $entityFactory)
+    public function __construct(InternalEntityFactoryInterface $entityFactory)
     {
         $this->entityFactory = $entityFactory;
     }
@@ -47,11 +47,11 @@ class RowManager
      */
     public function fillMissingIndexesWithEmptyCells(Row $row)
     {
-        $rowCells = $row->getCells();
-        if (count($rowCells) === 0) {
+        if ($row->getNumCells() === 0) {
             return $row;
         }
 
+        $rowCells = $row->getCells();
         $maxCellIndex = max(array_keys($rowCells));
 
         for ($cellIndex = 0; $cellIndex < $maxCellIndex; $cellIndex++) {
diff --git a/src/Spout/Reader/ODS/Creator/InternalEntityFactory.php b/src/Spout/Reader/ODS/Creator/InternalEntityFactory.php
index 7df4d8b..04c212c 100644
--- a/src/Spout/Reader/ODS/Creator/InternalEntityFactory.php
+++ b/src/Spout/Reader/ODS/Creator/InternalEntityFactory.php
@@ -73,7 +73,7 @@ class InternalEntityFactory implements InternalEntityFactoryInterface
         $shouldFormatDates = $optionsManager->getOption(Options::SHOULD_FORMAT_DATES);
         $cellValueFormatter = $this->helperFactory->createCellValueFormatter($shouldFormatDates);
         $xmlProcessor = $this->createXMLProcessor($xmlReader);
-        $rowManager = $this->managerFactory->createRowManager();
+        $rowManager = $this->managerFactory->createRowManager($this);
 
         return new RowIterator($xmlReader, $optionsManager, $cellValueFormatter, $xmlProcessor, $rowManager, $this);
     }
@@ -82,7 +82,7 @@ class InternalEntityFactory implements InternalEntityFactoryInterface
      * @param Cell[] $cells
      * @return Row
      */
-    public function createRow(array $cells)
+    public function createRow(array $cells = [])
     {
         return new Row($cells);
     }
diff --git a/src/Spout/Reader/ODS/Creator/ManagerFactory.php b/src/Spout/Reader/ODS/Creator/ManagerFactory.php
index 2543bdc..3644d15 100644
--- a/src/Spout/Reader/ODS/Creator/ManagerFactory.php
+++ b/src/Spout/Reader/ODS/Creator/ManagerFactory.php
@@ -2,7 +2,7 @@
 
 namespace Box\Spout\Reader\ODS\Creator;
 
-use Box\Spout\Reader\ODS\Manager\RowManager;
+use Box\Spout\Reader\Common\Manager\RowManager;
 
 /**
  * Class ManagerFactory
@@ -11,10 +11,11 @@ use Box\Spout\Reader\ODS\Manager\RowManager;
 class ManagerFactory
 {
     /**
+     * @param InternalEntityFactory $entityFactory Factory to create entities
      * @return RowManager
      */
-    public function createRowManager()
+    public function createRowManager($entityFactory)
     {
-        return new RowManager();
+        return new RowManager($entityFactory);
     }
 }
diff --git a/src/Spout/Reader/ODS/Manager/RowManager.php b/src/Spout/Reader/ODS/Manager/RowManager.php
deleted file mode 100644
index d9e8970..0000000
--- a/src/Spout/Reader/ODS/Manager/RowManager.php
+++ /dev/null
@@ -1,29 +0,0 @@
-<?php
-
-namespace Box\Spout\Reader\ODS\Manager;
-
-use Box\Spout\Reader\Common\Entity\Row;
-
-/**
- * Class RowManager
- */
-class RowManager
-{
-    /**
-     * Detect whether a row is considered empty.
-     * An empty row has all of its cells empty.
-     *
-     * @param Row $row
-     * @return bool
-     */
-    public function isEmpty(Row $row)
-    {
-        foreach ($row->getCells() as $cell) {
-            if (!$cell->isEmpty()) {
-                return false;
-            }
-        }
-
-        return true;
-    }
-}
diff --git a/src/Spout/Reader/ODS/RowIterator.php b/src/Spout/Reader/ODS/RowIterator.php
index e41a14d..ce61a32 100644
--- a/src/Spout/Reader/ODS/RowIterator.php
+++ b/src/Spout/Reader/ODS/RowIterator.php
@@ -7,6 +7,7 @@ use Box\Spout\Common\Manager\OptionsManagerInterface;
 use Box\Spout\Reader\Common\Entity\Cell;
 use Box\Spout\Reader\Common\Entity\Options;
 use Box\Spout\Reader\Common\Entity\Row;
+use Box\Spout\Reader\Common\Manager\RowManager;
 use Box\Spout\Reader\Common\XMLProcessor;
 use Box\Spout\Reader\Exception\InvalidValueException;
 use Box\Spout\Reader\Exception\IteratorNotRewindableException;
@@ -14,7 +15,6 @@ use Box\Spout\Reader\Exception\XMLProcessingException;
 use Box\Spout\Reader\IteratorInterface;
 use Box\Spout\Reader\ODS\Creator\InternalEntityFactory;
 use Box\Spout\Reader\ODS\Helper\CellValueFormatter;
-use Box\Spout\Reader\ODS\Manager\RowManager;
 use Box\Spout\Reader\Wrapper\XMLReader;
 
 /**
@@ -190,7 +190,7 @@ class RowIterator implements IteratorInterface
      */
     protected function readDataForNextRow()
     {
-        $this->currentlyProcessedRow = $this->entityFactory->createRow([]);
+        $this->currentlyProcessedRow = $this->entityFactory->createRow();
 
         try {
             $this->xmlProcessor->readUntilStopped();
@@ -257,7 +257,7 @@ class RowIterator implements IteratorInterface
 
         // if the row is empty, we don't want to return more than one cell
         $actualNumColumnsRepeated = (!$isEmptyRow) ? $this->numColumnsRepeated : 1;
-        $numCellsInCurrentlyProcessedRow = count($this->currentlyProcessedRow->getCells());
+        $numCellsInCurrentlyProcessedRow = $this->currentlyProcessedRow->getNumCells();
 
         // Only add the value if the last read cell is not a trailing empty cell repeater in Excel.
         // The current count of read columns is determined by counting the values in "$this->currentlyProcessedRowData".
diff --git a/src/Spout/Reader/XLSX/Creator/InternalEntityFactory.php b/src/Spout/Reader/XLSX/Creator/InternalEntityFactory.php
index db402ad..16966b2 100644
--- a/src/Spout/Reader/XLSX/Creator/InternalEntityFactory.php
+++ b/src/Spout/Reader/XLSX/Creator/InternalEntityFactory.php
@@ -116,7 +116,7 @@ class InternalEntityFactory implements InternalEntityFactoryInterface
      * @param Cell[] $cells
      * @return Row
      */
-    public function createRow(array $cells)
+    public function createRow(array $cells = [])
     {
         return new Row($cells);
     }
diff --git a/src/Spout/Reader/XLSX/Creator/ManagerFactory.php b/src/Spout/Reader/XLSX/Creator/ManagerFactory.php
index 20207cc..d23a53f 100644
--- a/src/Spout/Reader/XLSX/Creator/ManagerFactory.php
+++ b/src/Spout/Reader/XLSX/Creator/ManagerFactory.php
@@ -2,7 +2,7 @@
 
 namespace Box\Spout\Reader\XLSX\Creator;
 
-use Box\Spout\Reader\XLSX\Manager\RowManager;
+use Box\Spout\Reader\Common\Manager\RowManager;
 use Box\Spout\Reader\XLSX\Manager\SharedStringsCaching\CachingStrategyFactory;
 use Box\Spout\Reader\XLSX\Manager\SharedStringsManager;
 use Box\Spout\Reader\XLSX\Manager\SheetManager;
diff --git a/src/Spout/Reader/XLSX/RowIterator.php b/src/Spout/Reader/XLSX/RowIterator.php
index 5f77f2f..aaa9789 100644
--- a/src/Spout/Reader/XLSX/RowIterator.php
+++ b/src/Spout/Reader/XLSX/RowIterator.php
@@ -5,6 +5,7 @@ namespace Box\Spout\Reader\XLSX;
 use Box\Spout\Common\Exception\IOException;
 use Box\Spout\Reader\Common\Entity\Cell;
 use Box\Spout\Reader\Common\Entity\Row;
+use Box\Spout\Reader\Common\Manager\RowManager;
 use Box\Spout\Reader\Common\XMLProcessor;
 use Box\Spout\Reader\Exception\InvalidValueException;
 use Box\Spout\Reader\Exception\XMLProcessingException;
@@ -13,7 +14,6 @@ use Box\Spout\Reader\Wrapper\XMLReader;
 use Box\Spout\Reader\XLSX\Creator\InternalEntityFactory;
 use Box\Spout\Reader\XLSX\Helper\CellHelper;
 use Box\Spout\Reader\XLSX\Helper\CellValueFormatter;
-use Box\Spout\Reader\XLSX\Manager\RowManager;
 
 /**
  * Class RowIterator
@@ -47,7 +47,7 @@ class RowIterator implements IteratorInterface
     /** @var Helper\CellValueFormatter Helper to format cell values */
     protected $cellValueFormatter;
 
-    /** @var \Box\Spout\Reader\XLSX\Manager\RowManager Manages rows */
+    /** @var \Box\Spout\Reader\Common\Manager\RowManager Manages rows */
     protected $rowManager;
 
     /** @var \Box\Spout\Reader\XLSX\Creator\InternalEntityFactory Factory to create entities */
@@ -215,7 +215,7 @@ class RowIterator implements IteratorInterface
      */
     protected function readDataForNextRow()
     {
-        $this->currentlyProcessedRow = $this->entityFactory->createRow([]);
+        $this->currentlyProcessedRow = $this->entityFactory->createRow();
 
         try {
             $this->xmlProcessor->readUntilStopped();
@@ -386,7 +386,7 @@ class RowIterator implements IteratorInterface
             if ($this->lastRowIndexProcessed !== $this->nextRowIndexToBeProcessed) {
                 // return empty row if mismatch between last processed row
                 // and the row that needs to be returned
-                $rowToBeProcessed = $this->entityFactory->createRow([]);
+                $rowToBeProcessed = $this->entityFactory->createRow();
             }
         }
 
diff --git a/src/Spout/Writer/Common/Entity/Row.php b/src/Spout/Writer/Common/Entity/Row.php
index 821c42d..e32166c 100644
--- a/src/Spout/Writer/Common/Entity/Row.php
+++ b/src/Spout/Writer/Common/Entity/Row.php
@@ -81,4 +81,12 @@ class Row
 
         return $this;
     }
+
+    /**
+     * @return int
+     */
+    public function getNumCells()
+    {
+        return count($this->cells);
+    }
 }
diff --git a/src/Spout/Writer/Common/Manager/WorkbookManagerAbstract.php b/src/Spout/Writer/Common/Manager/WorkbookManagerAbstract.php
index e01e61a..06f659f 100644
--- a/src/Spout/Writer/Common/Manager/WorkbookManagerAbstract.php
+++ b/src/Spout/Writer/Common/Manager/WorkbookManagerAbstract.php
@@ -259,7 +259,7 @@ abstract class WorkbookManagerAbstract implements WorkbookManagerInterface
 
         // update max num columns for the worksheet
         $currentMaxNumColumns = $worksheet->getMaxNumColumns();
-        $cellsCount = count($row->getCells());
+        $cellsCount = $row->getNumCells();
         $worksheet->setMaxNumColumns(max($currentMaxNumColumns, $cellsCount));
     }
 
diff --git a/src/Spout/Writer/ODS/Manager/WorksheetManager.php b/src/Spout/Writer/ODS/Manager/WorksheetManager.php
index 1dfe580..9b260b0 100644
--- a/src/Spout/Writer/ODS/Manager/WorksheetManager.php
+++ b/src/Spout/Writer/ODS/Manager/WorksheetManager.php
@@ -111,7 +111,6 @@ class WorksheetManager implements WorksheetManagerInterface
     public function addRow(Worksheet $worksheet, Row $row)
     {
         $cells = $row->getCells();
-        $cellsCount = count($cells);
         $rowStyle = $row->getStyle();
 
         $data = '<table:table-row table:style-name="ro1">';
@@ -119,7 +118,7 @@ class WorksheetManager implements WorksheetManagerInterface
         $currentCellIndex = 0;
         $nextCellIndex = 1;
 
-        for ($i = 0; $i < $cellsCount; $i++) {
+        for ($i = 0; $i < $row->getNumCells(); $i++) {
             /** @var Cell $cell */
             $cell = $cells[$currentCellIndex];
             /** @var Cell|null $nextCell */
diff --git a/src/Spout/Writer/XLSX/Manager/WorksheetManager.php b/src/Spout/Writer/XLSX/Manager/WorksheetManager.php
index 2995fd5..702986e 100644
--- a/src/Spout/Writer/XLSX/Manager/WorksheetManager.php
+++ b/src/Spout/Writer/XLSX/Manager/WorksheetManager.php
@@ -156,7 +156,7 @@ EOD;
         $cellIndex = 0;
         $rowStyle = $row->getStyle();
         $rowIndex = $worksheet->getLastWrittenRowIndex() + 1;
-        $numCells = count($row->getCells());
+        $numCells = $row->getNumCells();
 
         $rowXML = '<row r="' . $rowIndex . '" spans="1:' . $numCells . '">';
 
diff --git a/tests/Spout/Reader/Common/Entity/RowTest.php b/tests/Spout/Reader/Common/Entity/RowTest.php
index 81a55ca..964c6e7 100644
--- a/tests/Spout/Reader/Common/Entity/RowTest.php
+++ b/tests/Spout/Reader/Common/Entity/RowTest.php
@@ -28,7 +28,7 @@ class RowTest extends \PHPUnit\Framework\TestCase
         $row = new Row([], null);
         $row->setCells([$this->getCellMock(), $this->getCellMock()]);
 
-        $this->assertEquals(2, count($row->getCells()));
+        $this->assertEquals(2, $row->getNumCells());
     }
 
     /**
@@ -39,11 +39,11 @@ class RowTest extends \PHPUnit\Framework\TestCase
         $row = new Row([], null);
         $row->setCells([$this->getCellMock(), $this->getCellMock()]);
 
-        $this->assertEquals(2, count($row->getCells()));
+        $this->assertEquals(2, $row->getNumCells());
 
         $row->setCells([$this->getCellMock()]);
 
-        $this->assertEquals(1, count($row->getCells()));
+        $this->assertEquals(1, $row->getNumCells());
     }
 
     /**
@@ -53,11 +53,11 @@ class RowTest extends \PHPUnit\Framework\TestCase
     {
         $row = new Row([], null);
 
-        $this->assertEquals(0, count($row->getCells()));
+        $this->assertEquals(0, $row->getNumCells());
 
         $row->setCells([$this->getCellMock(), $this->getCellMock()]);
 
-        $this->assertEquals(2, count($row->getCells()));
+        $this->assertEquals(2, $row->getNumCells());
     }
 
     /**
@@ -68,11 +68,11 @@ class RowTest extends \PHPUnit\Framework\TestCase
         $row = new Row([], null);
         $row->setCells([$this->getCellMock(), $this->getCellMock()]);
 
-        $this->assertEquals(2, count($row->getCells()));
+        $this->assertEquals(2, $row->getNumCells());
 
         $row->addCell($this->getCellMock());
 
-        $this->assertEquals(3, count($row->getCells()));
+        $this->assertEquals(3, $row->getNumCells());
     }
 
     /**
diff --git a/tests/Spout/Reader/XLSX/Manager/RowManagerTest.php b/tests/Spout/Reader/Common/Manager/RowManagerTest.php
similarity index 98%
rename from tests/Spout/Reader/XLSX/Manager/RowManagerTest.php
rename to tests/Spout/Reader/Common/Manager/RowManagerTest.php
index 91dd240..b17eb04 100644
--- a/tests/Spout/Reader/XLSX/Manager/RowManagerTest.php
+++ b/tests/Spout/Reader/Common/Manager/RowManagerTest.php
@@ -1,6 +1,6 @@
 <?php
 
-namespace Box\Spout\Reader\XLSX\Manager;
+namespace Box\Spout\Reader\Common\Manager;
 
 use Box\Spout\Reader\Common\Entity\Cell;
 use Box\Spout\Reader\Common\Entity\Row;
diff --git a/tests/Spout/Reader/ODS/Manager/RowManagerTest.php b/tests/Spout/Reader/ODS/Manager/RowManagerTest.php
deleted file mode 100644
index c0f0b6d..0000000
--- a/tests/Spout/Reader/ODS/Manager/RowManagerTest.php
+++ /dev/null
@@ -1,41 +0,0 @@
-<?php
-
-namespace Box\Spout\Reader\ODS\Manager;
-
-use Box\Spout\Reader\Common\Entity\Cell;
-use Box\Spout\Reader\Common\Entity\Row;
-
-/**
- * Class RowManagerTest
- */
-class RowManagerTest extends \PHPUnit_Framework_TestCase
-{
-    /**
-     * @return array
-     */
-    public function dataProviderForTestIsEmptyRow()
-    {
-        return [
-            // cells, expected isEmpty
-            [[], true],
-            [[new Cell('')], true],
-            [[new Cell(''), new Cell('')], true],
-            [[new Cell(''), new Cell(''), new Cell('Okay')], false],
-        ];
-    }
-
-    /**
-     * @dataProvider dataProviderForTestIsEmptyRow
-     *
-     * @param array $cells
-     * @param bool $expectedIsEmpty
-     * @return void
-     */
-    public function testIsEmptyRow(array $cells, $expectedIsEmpty)
-    {
-        $rowManager = new RowManager();
-        $row = new Row($cells);
-
-        $this->assertEquals($expectedIsEmpty, $rowManager->isEmpty($row));
-    }
-}
diff --git a/tests/Spout/Writer/Common/Entity/RowTest.php b/tests/Spout/Writer/Common/Entity/RowTest.php
index c036813..8f1859a 100644
--- a/tests/Spout/Writer/Common/Entity/RowTest.php
+++ b/tests/Spout/Writer/Common/Entity/RowTest.php
@@ -39,7 +39,7 @@ class RowTest extends TestCase
         $row = new Row([], null);
         $row->setCells([$this->getCellMock(), $this->getCellMock()]);
 
-        $this->assertEquals(2, count($row->getCells()));
+        $this->assertEquals(2, $row->getNumCells());
     }
 
     /**
@@ -50,11 +50,11 @@ class RowTest extends TestCase
         $row = new Row([], null);
         $row->setCells([$this->getCellMock(), $this->getCellMock()]);
 
-        $this->assertEquals(2, count($row->getCells()));
+        $this->assertEquals(2, $row->getNumCells());
 
         $row->setCells([$this->getCellMock()]);
 
-        $this->assertEquals(1, count($row->getCells()));
+        $this->assertEquals(1, $row->getNumCells());
     }
 
     /**
@@ -64,11 +64,11 @@ class RowTest extends TestCase
     {
         $row = new Row([], null);
 
-        $this->assertEquals(0, count($row->getCells()));
+        $this->assertEquals(0, $row->getNumCells());
 
         $row->setCells([$this->getCellMock(), $this->getCellMock()]);
 
-        $this->assertEquals(2, count($row->getCells()));
+        $this->assertEquals(2, $row->getNumCells());
     }
 
     /**
@@ -79,11 +79,11 @@ class RowTest extends TestCase
         $row = new Row([], null);
         $row->setCells([$this->getCellMock(), $this->getCellMock()]);
 
-        $this->assertEquals(2, count($row->getCells()));
+        $this->assertEquals(2, $row->getNumCells());
 
         $row->addCell($this->getCellMock());
 
-        $this->assertEquals(3, count($row->getCells()));
+        $this->assertEquals(3, $row->getNumCells());
     }
 
     /**