code: public void close() {
  		mmaps.clear(false);
  		try {
  			unlock();
  		} catch (Exception ign) {
  		}
  		try {
  			fileChannel.close();
  		} catch (Exception ign) {
  		}
  		try {
  			raf.close();
  		} catch (Exception ign) {
  		}
  		fileChannel = null;
  		raf = null;
  		validState = false;
  	}
docs: Close file