mainPanel = new JPanel();
this.logger = Logger.getLogger(this.getClass());
StatisticsDataManager smm = StatisticsDataManager.getInstance();
smm.addObserver(new Observer() {
@Override
public void update(Observable o, Object arg) {
if (arg instanceof ObserverNotification) {
final ObserverNotification notification = (ObserverNotification) arg;
final NotificationType type = notification.getType();