Não consigo fazer a conexao com o MySQL ! qual o erro?

public static final String JDBC_DRIVER = "com.mysql.jdbc.driver";
public static final String DATABASE_URL = "jdbc:mysql://localhost/test";
public static Connection co;
public static Statement st;

public static void conecta(){
	try{
		Class.forName(JDBC_DRIVER);
		co = DriverManager.getConnection(DATABASE_URL,"root","0");
		st =  co.createStatement();
		System.out.println("Conectou ao Banco");
	}
	catch(Exception e){
		//System.out.println(e.getMessage());
		System.out.println("Não conectou");
	}
}
public static void desconecta(){
		try{
			co.close();
			System.out.println("Fechado Banco");	
		}
		catch(Exception e){
			System.out.println(e.getMessage());
		}
}

public static void main(String[] args) {
	Conexao conection = new Conexao();
	conection.conecta();
	conection.desconecta();
}