diff --git a/Classes/PHPExcel.php b/Classes/PHPExcel.php
index 19213c2..6090edf 100644
--- a/Classes/PHPExcel.php
+++ b/Classes/PHPExcel.php
@@ -664,7 +664,7 @@ class PHPExcel
     /**
      * Check if style exists in style collection
      *
-     * @param  PHPExcel_Style $style
+     * @param  PHPExcel_Style $pCellStyle
      * @return boolean
      */
     public function cellXfExists($pCellStyle = null)
@@ -883,6 +883,11 @@ class PHPExcel
         }
     }
 
+    /**
+     * Return the unique ID value assigned to this spreadsheet workbook
+     *
+     * @return string
+     */
     public function getID() {
         return $this->_uniqueID;
     }
diff --git a/Classes/PHPExcel/CachedObjectStorage/CacheBase.php b/Classes/PHPExcel/CachedObjectStorage/CacheBase.php
index c4b5781..249abaf 100644
--- a/Classes/PHPExcel/CachedObjectStorage/CacheBase.php
+++ b/Classes/PHPExcel/CachedObjectStorage/CacheBase.php
@@ -86,6 +86,11 @@ abstract class PHPExcel_CachedObjectStorage_CacheBase {
 	}	//	function __construct()
 
 
+	/**
+	 * Return the parent worksheet for this cell collection
+	 *
+	 * @return	PHPExcel_Worksheet
+	 */
 	public function getParent()
 	{
 		return $this->_parent;
@@ -214,17 +219,32 @@ abstract class PHPExcel_CachedObjectStorage_CacheBase {
 	}
 
 
+	/**
+	 * Return the cell address of the currently active cell object
+	 *
+	 * @return	string
+	 */
 	public function getCurrentAddress()
 	{
 		return $this->_currentObjectID;
 	}
 
+	/**
+	 * Return the column address of the currently active cell object
+	 *
+	 * @return	string
+	 */
 	public function getCurrentColumn()
 	{
 		sscanf($this->_currentObjectID, '%[A-Z]%d', $column, $row);
 		return $column;
 	}
 
+	/**
+	 * Return the row address of the currently active cell object
+	 *
+	 * @return	string
+	 */
 	public function getCurrentRow()
 	{
 		sscanf($this->_currentObjectID, '%[A-Z]%d', $column, $row);
diff --git a/Classes/PHPExcel/CachedObjectStorage/SQLite3.php b/Classes/PHPExcel/CachedObjectStorage/SQLite3.php
index ecd8029..f573b03 100644
--- a/Classes/PHPExcel/CachedObjectStorage/SQLite3.php
+++ b/Classes/PHPExcel/CachedObjectStorage/SQLite3.php
@@ -49,9 +49,32 @@ class PHPExcel_CachedObjectStorage_SQLite3 extends PHPExcel_CachedObjectStorage_
 	 */
 	private $_DBHandle = null;
 
+	/**
+	 * Prepared statement for a SQLite3 select query
+	 *
+	 * @var SQLite3Stmt
+	 */
 	private $_selectQuery;
+
+	/**
+	 * Prepared statement for a SQLite3 insert query
+	 *
+	 * @var SQLite3Stmt
+	 */
 	private $_insertQuery;
+
+	/**
+	 * Prepared statement for a SQLite3 update query
+	 *
+	 * @var SQLite3Stmt
+	 */
 	private $_updateQuery;
+
+	/**
+	 * Prepared statement for a SQLite3 delete query
+	 *
+	 * @var SQLite3Stmt
+	 */
 	private $_deleteQuery;
 
     /**
diff --git a/Classes/PHPExcel/CachedObjectStorageFactory.php b/Classes/PHPExcel/CachedObjectStorageFactory.php
index f68431e..0e7648d 100644
--- a/Classes/PHPExcel/CachedObjectStorageFactory.php
+++ b/Classes/PHPExcel/CachedObjectStorageFactory.php
@@ -237,6 +237,10 @@ class PHPExcel_CachedObjectStorageFactory
     }   //    function getInstance()
 
 
+    /**
+     * Clear the cache storage
+     *
+     **/
 	public static function finalize()
 	{
 		self::$_cacheStorageMethod = NULL;
diff --git a/Classes/PHPExcel/Writer/PDF.php b/Classes/PHPExcel/Writer/PDF.php
index cacd9c7..d346f8a 100644
--- a/Classes/PHPExcel/Writer/PDF.php
+++ b/Classes/PHPExcel/Writer/PDF.php
@@ -36,13 +36,18 @@
 class PHPExcel_Writer_PDF
 {
 
+    /**
+     * The wrapper for the requested PDF rendering engine
+     *
+     * @var PHPExcel_Writer_PDF_Core
+     */
     private $_renderer = NULL;
 
     /**
      *  Instantiate a new renderer of the configured type within this container class
      *
-     *  @param     PHPExcel    $phpExcel        PHPExcel object
-     *  @throws    PHPExcel_Writer_Exception    when PDF library is not configured
+     *  @param  PHPExcel   $phpExcel         PHPExcel object
+     *  @throws PHPExcel_Writer_Exception    when PDF library is not configured
      */
     public function __construct(PHPExcel $phpExcel)
     {
@@ -67,16 +72,16 @@ class PHPExcel_Writer_PDF
 
 
     /**
-     *  Magic method to handle direct calls to the configured PDF renderer wrapper class
+     *  Magic method to handle direct calls to the configured PDF renderer wrapper class.
      *
-     *  @param     string    $name        Renderer library method name
-     *  @param     mixed[]   $arguments   Array of arguments to pass to the renderer method
-     *  @return    mixed     Returned data from the PDF renderer wrapper method
+     *  @param   string   $name        Renderer library method name
+     *  @param   mixed[]  $arguments   Array of arguments to pass to the renderer method
+     *  @return  mixed    Returned data from the PDF renderer wrapper method
      */
     public function __call($name, $arguments)
     {
         if ($this->_renderer === NULL) {
-            throw new PHPExcel_Writer_Exception("PDF Renderer has not been defined.");
+            throw new PHPExcel_Writer_Exception("PDF Rendering library has not been defined.");
         }
 
         return call_user_func_array(array($this->_renderer, $name), $arguments);
diff --git a/Classes/PHPExcel/Writer/PDF/Core.php b/Classes/PHPExcel/Writer/PDF/Core.php
index 8669333..6c270f9 100644
--- a/Classes/PHPExcel/Writer/PDF/Core.php
+++ b/Classes/PHPExcel/Writer/PDF/Core.php
@@ -322,7 +322,7 @@ abstract class PHPExcel_Writer_PDF_Core extends PHPExcel_Writer_HTML
     /**
      *  Save PHPExcel to PDF file, pre-save
      *
-     *  @param     string         $pFileName
+     *  @param     string     $pFileName   Name of the file to save as
      *  @throws    PHPExcel_Writer_Exception
      */
     protected function prepareForSave($pFilename = NULL)
diff --git a/Classes/PHPExcel/Writer/PDF/DomPDF.php b/Classes/PHPExcel/Writer/PDF/DomPDF.php
index 5abd0a3..d06bc4d 100644
--- a/Classes/PHPExcel/Writer/PDF/DomPDF.php
+++ b/Classes/PHPExcel/Writer/PDF/DomPDF.php
@@ -56,7 +56,7 @@ class PHPExcel_Writer_PDF_DomPDF extends PHPExcel_Writer_PDF_Core implements PHP
     /**
      *  Save PHPExcel to file
      *
-     *  @param     string         $pFileName
+     *  @param     string     $pFileName   Name of the file to save as
      *  @throws    PHPExcel_Writer_Exception
      */
     public function save($pFilename = NULL)
diff --git a/Classes/PHPExcel/Writer/PDF/mPDF.php b/Classes/PHPExcel/Writer/PDF/mPDF.php
index a9b6b0f..e9b8a6e 100644
--- a/Classes/PHPExcel/Writer/PDF/mPDF.php
+++ b/Classes/PHPExcel/Writer/PDF/mPDF.php
@@ -46,7 +46,7 @@ class PHPExcel_Writer_PDF_mPDF extends PHPExcel_Writer_PDF_Core implements PHPEx
     /**
      *  Create a new PHPExcel_Writer_PDF
      *
-     *  @param     PHPExcel    $phpExcel    PHPExcel object
+     *  @param  PHPExcel    $phpExcel    PHPExcel object
      */
     public function __construct(PHPExcel $phpExcel)
     {
@@ -56,7 +56,7 @@ class PHPExcel_Writer_PDF_mPDF extends PHPExcel_Writer_PDF_Core implements PHPEx
     /**
      *  Save PHPExcel to file
      *
-     *  @param     string         $pFileName
+     *  @param     string     $pFileName   Name of the file to save as
      *  @throws    PHPExcel_Writer_Exception
      */
     public function save($pFilename = NULL)
diff --git a/Classes/PHPExcel/Writer/PDF/tcPDF.php b/Classes/PHPExcel/Writer/PDF/tcPDF.php
index 23a6e31..289610a 100644
--- a/Classes/PHPExcel/Writer/PDF/tcPDF.php
+++ b/Classes/PHPExcel/Writer/PDF/tcPDF.php
@@ -57,7 +57,7 @@ class PHPExcel_Writer_PDF_tcPDF extends PHPExcel_Writer_PDF_Core implements PHPE
     /**
      *  Save PHPExcel to file
      *
-     *  @param     string         $pFileName
+     *  @param     string     $pFileName   Name of the file to save as
      *  @throws    PHPExcel_Writer_Exception
      */
     public function save($pFilename = NULL)