public class MYSQL extends JavaPlugin {

    private Connection connection;
    public String host, database, username, password;
    public int database_port;

    @Override
    public void onEnable() {
        setupMYSQL();
    }

    private void setupMYSQL() {
        host = "localhost";
        database = "test";
        username = "root";
        password = "password";
        database_port = 3306;

        setupConnection();
    }

    private void setupConnection() {
        try {

            synchronized (this) {
                if (getConnection() != null && !getConnection().isClosed()) {
                    return;
                }

                Class.forName("com.mysql.jdbc.Driver");
                setConnection(DriverManager.getConnection("jdbc:mysql://" + this.host + ":" + this.database_port + "/" + this.database, this.username, this.password));

                Bukkit.getConsoleSender().sendMessage("§aMYSQL Connection Establish");
            }

        } catch (SQLException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }

    public Connection getConnection() {
        return connection;
    }

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