Flood floodToJoin = new Flood( this, floodFilename ); if ( floodToJoin.Id() != null ) { floods.put( floodToJoin.Id(), floodToJoin ); return true; } return false;
return JoinFlood(floodFilename, true);
  public boolean JoinFlood( String floodFilename )  {    Flood floodToJoin = new Flood( this, floodFilename );    if ( floodToJoin.Id() != null )    {      floods.put( floodToJoin.Id(), floodToJoin );      return true;    }    return false;  }