[PHP] Нужно упростить класс

class MYSQL{
        
    private $DBHOST = "localhost";
    private $DBNAME = "site";
    private $DBUSER = "root";
    private $DBPASS = "228";
    private $instance;
    
    function __construct(){
        try{
            $this->instance = new PDO('mysql:host='.$this->DBHOST.';dbname='.$this->DBNAME, $this->DBUSER, $this->DBPASS);
            $this->instance->query("SET NAMES utf8");
        }
            
        catch(PDOException $e){ 
            die("Ошибочка: ".$e->getMessage());
        }
    }
    
    function query($query){
        return $this->instance->query($query);
    }
    
    function fetch(){
        return $this->instance->fetch();
    }
}