JPanel buttonPanel = new JPanel();
buttonPanel.setLayout(new BoxLayout(buttonPanel, BoxLayout.LINE_AXIS));
buttonPanel.setAlignmentX(Component.CENTER_ALIGNMENT);
buttonPanel.add(new OneStepButton(synchronizer));
buttonPanel.add(new StartButton(synchronizer));
buttonPanel.add(new StopButton(synchronizer));
add(buttonPanel);
Border blacklineBorder = BorderFactory.createLineBorder(Color.black);