Code MySQL

package BanManager.MySQL;

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

import BanManager.main.main;

public class MySQL {

    public static String username;
    public static String password;
    public static String database;
    public static String host;
    public static String port;
    public static Connection con;

    public static void connect() {

        if(!isConnected()) {

            try {
                con = DriverManager.getConnection("jdbc:mysql://" + host + ":" + port + "/" + database, username, password);
                main.sendConsole(main.getInstance().prefix + "§aMySQL Verbindung aufgebaut!");
            } catch (SQLException e) {
                e.printStackTrace();
            }

        }

    }

    public static void close() {

        if(isConnected()) {

            try {
                con.close();
                main.sendConsole(main.getInstance().prefix + "§aMySQL Verbindung geschlossen!");
            } catch (SQLException e) {
                e.printStackTrace();
            }

        }

    }

    public static boolean isConnected() {

        return con != null;

    }

    public static void createTable() {

        /*
         *
         *
         * Syntax: Spielername, UUID, Ende, Grund
         *
         *
         */

        if(isConnected()) {

            try {
                con.createStatement().executeUpdate("CREATE TABLE IF NOT EXISTS GebannteSpieler (Spielername VARCHAR(100), UUID VARCHAR(100), Ende VARCHAR(100), Grund VARCHAR(100))");
            } catch (SQLException e) {
                e.printStackTrace();
            }

        }

    }

}