public void onEnable() {
        dataFolder = getDataFolder();

        Configuration.pairFileAndClass(loadFile("config.yml"), Properties.class);
        Configuration.pairFileAndClass(loadFile("local.yml"), Messages.class);

        if (Properties.SHOW_NOTIFICATION_ON_TRANSACTION) {
            getServer().getPluginManager().registerEvents(new TransactionListener(), this);
        }

        if (Properties.SHOW_NOTIFICATION_ON_SHOP_CREATION) {
            getServer().getPluginManager().registerEvents(new ShopCreationListener(), this);
        }
    }