Fixes DocBlock in Zend_Cache_Backend_Static

library/Zend/Cache/Backend/Static.php

@@ -393,6 +393,7 @@ class Zend_Cache_Backend_Static
      * @param  string $mode Clean mode
      * @param  array  $tags Array of tags
      * @return boolean true if no problem
+     * @throws Zend_Exception
      */
     public function clean($mode = Zend_Cache::CLEANING_MODE_ALL, $tags = array())
     {