DBConnection PHP class

<?php

class DBConnection {
    protected $username = '';
    protected $password = '';
    protected $dbName = '';
    protected $hostName = '';

    function __construct($username, $password, $dbName, $hostname) {
        $this->username = $username;
        $this->password = $password;
        $this->dbName = $dbName;
        $this->hostName = $hostname;
    }

    public function getUsername() {
        return $this->username;
    }

    public function getPassword() {
        return $this->password;
    }

    public function getDbName() {
        return $this->dbName;
    }

    public function getHostName() {
        return $this->hostName;
    }

    /**
     * Create a PDO connection.
     * @return PDO
     */
    public function connect() {
        try {
            $dbh = new PDO('mysql:host=' . $this->hostName . ';dbname=' . $this->dbName, $this->username, $this->password);
            return $dbh;
        }
        catch (PDOException $e) {
            error_log('Error Could not connect to database. PDOException: ' . $e->getMessage());
            return false;
        }
    }
}

$dbh = (new DBConnection('appname', 'lhlftlvevlergjidjbgvtdkdlhrfd', 'appname', 'localhost'))->connect();