add temporary filestorage backend for testing purposed

lib/filestorage/local.php

@@ -3,7 +3,7 @@
  * for local filestore, we only have to map the paths
  */
 class OC_Filestorage_Local extends OC_Filestorage{
-	private $datadir;
+	protected $datadir;
 	private static $mimetypes=null;
 	public function __construct($arguments){
 		$this->datadir=$arguments['datadir'];

lib/filestorage/temporary.php

@@ -0,0 +1,17 @@
+<?php
+/**
+ * local storage backnd in temporary folder for testing purpores
+ */
+class OC_Filestorage_Temporary extends OC_Filestorage_Local{
+	public function __construct($arguments){
+		$this->datadir=OC_Helper::tmpFolder();
+	}
+
+	public function cleanUp(){
+		OC_Helper::rmdirr($this->datadir);
+	}
+
+	public function __destruct(){
+		$this->cleanUp();
+	}
+}