log.log(log.LOG_ERROR, UserAdminMsg.Backing_Store_Write_Exception, ex);
log.log(LogService.LOG_ERROR, UserAdminMsg.Backing_Store_Write_Exception, ex);
	protected void destroy() {		try {			rootNode.flush();			rootNode = null;			preferencesService = null;		} catch (BackingStoreException ex) {			log.log(log.LOG_ERROR, UserAdminMsg.Backing_Store_Write_Exception, ex);		}	}