Database class

package com.theTrixxter.mysql;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

import org.bukkit.plugin.Plugin;

public abstract class database {

	public Connection con;
	public Plugin plugin;
	public database(Plugin plugin){
		this.plugin = plugin;
		this.con = null;
	}

	public abstract Connection  openConnection() throws SQLException,
		ClassNotFoundException;

	public boolean checkConnection() throws SQLException{
		return con != null &&  !con.isClosed();
	}

	public Connection getConnection(){
		return con;
	}

	public boolean closeConnection() throws SQLException{
		if(con == null){
			return false;
		}
		con.close();
		return true;
	}

	public ResultSet querySQL(String s) throws SQLException,
		ClassNotFoundException{
		if(!checkConnection()){
			openConnection();
		}
		Statement st = con.createStatement();
		ResultSet rs = st.executeQuery(s);
		return rs;
	}

	public int updateSQL(String s) throws SQLException,
		ClassNotFoundException{
		if(!checkConnection()){
			openConnection();
		}
		Statement st = con.createStatement();
		int rs = st.executeUpdate(s);
		return rs;
	}

}