code: public synchronized void close() {
  		if (validState) {
  			sync();
  		}
  		try {
  			fcInput.close();
  		} catch (Exception ign) {
  		}
  		try {
  			rafInput.close();
  		} catch (Exception ign) {
  		}
  		try {
  			osOutput.close();
  		} catch (Exception ign) {
  		}
  		try {
  			fcOutput.close();
  		} catch (Exception ign) {
  		}
  		rafInput = null;
  		fcInput = null;
  		osOutput = null;
  		fcOutput = null;
  		//
  		validState = false;
  	}
docs: Close file