public void initialize() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (Exception e) {
System.err.println("Error setting LookAndFeelClassName: " + e);
}
// create and initialize the connectivity
dbManager = new DbManager();
dbManager.openConnection();
queryManager = new QueryManager(dbManager);
}
private void shutdown() {
mainWindow.dispose();
dbManager.closeConnection();
}