/**
  * Notify the listeners that an content relation was deleted.
  *
  * @param cr content relation
  * @throws SystemException One of the listeners threw an exception.
  */
 private void fireContentRelationDeleted(final ContentRelationCreate cr) throws SystemException {
   for (final ResourceListener contentRelationListener : this.contentRelationListeners) {
     contentRelationListener.resourceDeleted(cr.getObjid());
   }
 }
 /**
  * Notify the listeners that an content relation was created.
  *
  * @param cr content relation
  * @param xmlData complete content relation XML
  * @throws SystemException One of the listeners threw an exception.
  */
 private void fireContentRelationCreated(final ContentRelationCreate cr, final String xmlData)
     throws SystemException {
   for (final ResourceListener contentRelationListener : this.contentRelationListeners) {
     contentRelationListener.resourceCreated(cr.getObjid(), xmlData);
   }
 }