public function put($key, $value) {
		WURFL_FileManager::save($key, $value, $this->_cacheDir);
	}
 /**
  * Saves the object on the file system
  * 
  *
  * @param string $objectId
  * @param mixed $object
  */
 public function save($objectId, $object)
 {
     WURFL_FileManager::save($this->encode($objectId), $object, $this->_persistenceDir);
 }