private void closeFile() {
		if (status_) {
			try {
				if (writer_ != null) {
					writer_.close();
					writer_ = null;
				}
				if (reader_ != null) {
					reader_.close();
					reader_ = null;
				}
			} catch (IOException e) {
				JOptionPane.showMessageDialog(this, e.getMessage());
			}
			status_ = false;

		}

	}