public Connection openConnection() throws Exception {
            Class.forName("com.mysql.jdbc.Driver");
            try {
                return this.conn = DriverManager.getConnection("jdbc:mysql://" + this.host + ":" + this.port + "/" + this.database, this.user, this.password);
            } catch (MySQLNonTransientConnectionException e) {
                System.out.println(this.database);
                e.printStackTrace();
                return null;
            }
        }