JDBConnection

import java.sql.*;
import java.util.ArrayList;

public final class JDBConnection { //zodanig niemand eraan kan
    private static JDBConnection instance = null;
    private Connection conn = null;

    private JDBConnection(){}

    public void openConnection(String database, String user, String pwd){
        try{
            Class.forName("com.mysql.jdbc.Driver");
            String url = "jdbc:mysql://127.0.0.1/" + database;
            conn = DriverManager.getConnection(url, user, pwd);
        }
        catch (Exception e ){
            System.out.println("Error: " + e);
        }
    }

    public void closeConnection(){

        if(conn != null){
            try{
                conn.close();
            }
            catch (SQLException ex){
                System.out.println("Error: " + ex);
            }
        }
    }

    public static synchronized JDBConnection getJDBConnection() {

        if(instance == null){
            instance = new JDBConnection();
        }
        return instance;
    }
}