diff --git a/h5p.classes.php b/h5p.classes.php
index 97c7064..c0cd835 100644
--- a/h5p.classes.php
+++ b/h5p.classes.php
@@ -107,8 +107,10 @@ interface H5PFrameworkInterface {
    *
    * @param object $libraryData
    *  Object holding the information that is to be stored
+   *
+   * @todo Describe object structure and members so new implementors know what to look for
    */
-  public function saveLibraryData(&$libraryData);
+  public function saveLibraryData(&$libraryData, $new = TRUE);
 
   /**
    * Stores contentData