diff --git a/lib/download.php b/lib/download.php
index 0c049d04..eaa0e312 100644
--- a/lib/download.php
+++ b/lib/download.php
@@ -12,12 +12,26 @@
 namespace OCA\Office;
 
 class Download {
+	
+	/**
+	 * Filesystem view
+	 * @var \OC\Files\View
+	 */
 	protected $view;
-	// File to be served
+	
+	/**
+	 * Path to the File to be served, relative to the view
+	 * @var string
+	 */
 	protected $filepath;
 	
 	protected $instance;
 
+	/**
+	 * Build download model according to the headers
+	 * @param type $view - filesystem view
+	 * @param type $filepath - path to the file relative to this view root
+	 */
 	public function __construct($view, $filepath){
 		$this->filepath = $filepath;
 		$this->view = $view;
@@ -29,6 +43,9 @@ class Download {
 		}
 	}
 	
+	/**
+	 * Send the requested content
+	 */
 	public function sendResponse(){
 		\OCP\Response::disableCaching();
 		
@@ -40,22 +57,40 @@ class Download {
 		exit();
 	}
 
+	/**
+	 * Get the name of the requested file
+	 * @return String 
+	 */
 	protected function getFilename(){
 		return basename($this->filepath);
 	}
 	
+	/**
+	 * Get the size of the requested file
+	 */
 	protected function getFilesize(){
 		return $this->view->filesize($this->filepath);
 	}
 	
+	/**
+	 * Get the mimetype of the requested file 
+	 * @return string
+	 */
 	protected function getMimeType(){
 		return $this->view->getMimeType($this->filepath);
 	}
 	
+	/**
+	 * Check if the requested file exists
+	 * @return bool
+	 */
 	protected function fileExists(){
 		return $this->view->file_exists($this->filepath);
 	}
 
+	/**
+	 * Send 404 Response
+	 */
 	protected function sendNotFound(){
 		header("HTTP/1.0 404 Not Found");
 		$tmpl = new OCP\Template('', '404', 'guest');
diff --git a/lib/download/range.php b/lib/download/range.php
index 6016e7bc..a23591f8 100644
--- a/lib/download/range.php
+++ b/lib/download/range.php
@@ -18,11 +18,19 @@ class Range extends \OCA\Office\Download {
 	// End of the range
 	protected $end;
 
+	/**
+	 * Build download model to serve HTTP_RANGE
+	 * @param type $view - filesystem view
+	 * @param type $filepath - path to the file relative to this view root
+	 */
 	public function __construct($view, $filepath){
 		$this->view = $view;
 		$this->filepath = $filepath;
 	}
 
+	/**
+	 * Send the requested parts of the file
+	 */
 	public function sendResponse(){
 		if (!preg_match('/^bytes=\d*-\d*(,\d*-\d*)*$/', $_SERVER['HTTP_RANGE'])){
 			$this->sendNotSatisfiable();
@@ -57,6 +65,9 @@ class Range extends \OCA\Office\Download {
 		}
 	}
 
+	/**
+	 * Send 416 if we can't satisfy the requested ranges
+	 */
 	protected function sendNotSatisfiable(){
 		header('HTTP/1.1 416 Requested Range Not Satisfiable');
 		header('Content-Range: bytes */' . $this->getFilesize()); // Required in 416.
diff --git a/lib/download/simple.php b/lib/download/simple.php
index 4d7d6414..fa540dac 100644
--- a/lib/download/simple.php
+++ b/lib/download/simple.php
@@ -10,15 +10,18 @@
  */
 
 namespace OCA\Office\Download;
-use OCA\Office\View;
 
 class Simple extends \OCA\Office\Download {
+
 	
 	public function __construct($view, $filepath){
 		$this->view = $view;
 		$this->filepath = $filepath;
 	}
 	
+	/**
+	 * Send the whole file content as a response
+	 */
 	public function sendResponse(){
 		header( 'Content-Type:' . $this->getMimeType() );