JPanel mainPanel = new JPanel(new BorderLayout());
_messageBox = new JTextArea();
mainPanel.add(new JScrollPane(_messageBox), BorderLayout.CENTER);
createButtons();
JPanel buttonHolder = new JPanel(new GridLayout(1, 2));
buttonHolder.add(_chooseFileButton);
buttonHolder.add(_printFileButton);
mainPanel.add(buttonHolder, BorderLayout.SOUTH);
getContentPane().add(mainPanel);