public void readUsers(String fileName) {
   try {
     InputStream userIs = ConfigFinder.getInstance().open(fileName);
     if (userIs != null) {
       if (_log.isInfoEnabled()) {
         _log.info("Reading users file...");
       }
       readUsers(userIs);
     } else {
       if (_log.isInfoEnabled()) {
         _log.info("UserFile.xml does not exist -- no users or role");
       }
     }
   } catch (Exception e) {
     if (_log.isWarnEnabled()) {
       _log.warn("Couldn't load users from file: ", e);
     }
   }
 }
 protected ConfigFinder getConfigFinder() {
   return ConfigFinder.getInstance();
 }