@Override
 public Status saveConfiguration() {
   return configurationService.persistConfiguration(
       new ArrayList<ConfigurationObject>(portDB.values()), FILE_NAME);
 }
 private void loadConfiguration() {
   for (ConfigurationObject conf : configurationService.retrieveConfiguration(this, FILE_NAME)) {
     NeutronPort nn = (NeutronPort) conf;
     portDB.put(nn.getID(), nn);
   }
 }