private Main plugin;
    private Connection connection;

    public MySQLHKNH(Main plugin) {
        this.plugin = plugin;
    }

    public void mysqlSetup() {
        String host = plugin.config.getIp();
        int port = 3306;
        String database = plugin.config.getDatabaseHKNH();
        String username = plugin.config.getUsername();
        String password = plugin.config.getPassword();
        try {
            synchronized (this) {
                if (getConnection() != null && !getConnection().isClosed()) {
                    return;
                }
                Class.forName("com.mysql.cj.jdbc.Driver");
                setConnection(
                        DriverManager.getConnection("jdbc:mysql://" + host + ":" + port + "/" + database + "?autoReconnect=true&serverTimezone=UTC", username, password));
            }
        } catch (SQLException | ClassNotFoundException e) {
            e.printStackTrace();
        }
    }

    private Connection getConnection() {
        return connection;
    }

    private void setConnection(Connection connection) {
        this.connection = connection;
    }