java.lang.ExceptionInInitializerError in Connection Factory

[vivek dhiman]

Hi Below is my code which will use as Connection Factory class. But i am getting java.lang.ExceptionInInitializerError. Please advice how to fix?

package j2ee.dao;
import java.sql.Connection;
import java.sql.DriverManager;
import java.util.Properties;

public class ConnFactory
{
	public static  Properties prop;
	static 
	{
	    prop=new Properties();
		try {
			prop.load(ConnFactory.class.getClassLoader().getResourceAsStream("DBConfig.properties"));
			
		} catch (Exception e) {
			e.printStackTrace();
		}	
	}
	
	private static ConnFactory instance = new ConnFactory();
    public static final String URL = prop.getProperty("DEVURL");
    public static final String USER = prop.getProperty("DEVUSER");
    public static final String PASSWORD = prop.getProperty("DEVPASSWORD");
    public static final String DRIVER_CLASS = prop.getProperty("DEVDRIVER_CLASS");
	
    private ConnFactory() {
        try {
            Class.forName(DRIVER_CLASS);
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        }
    }
 
    private Connection createConnection() {
        Connection connection = null;
        try {
            connection = DriverManager.getConnection(URL, USER, PASSWORD);
        } catch (Exception e) {
            System.out.println("ERROR: Unable to Connect to Database.");
        }
        return connection;
    }  
 
    public static Connection getConnection() {
        return instance.createConnection();
    }
    public static void main(String a[])
    {
    	Connection test=ConnFactory.getConnection();
    	System.out.println("Done");
    	
    }

}