@Override
    public void open() {
        try {
            // https://mysql.student.sussex.ac.uk/phpmyadmin/
//            conn = DriverManager.getConnection(dbUrl, username, password);
            conn = DriverManager.getConnection(dbUrl);
            
            // create the table if necessary
            createTable();
            System.out.println("> Connection to table '" + tableName + "' has been found.");
        } catch (SQLException ex) {
            ex.printStackTrace();
        }
    }