refactored Factory Method pattern

Creational/FactoryMethod/FileLogger.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace DesignPatterns\Creational\FactoryMethod;
+
+class FileLogger implements Logger
+{
+    /**
+     * @var string
+     */
+    private $filePath;
+
+    public function __construct(string $filePath)
+    {
+        $this->filePath = $filePath;
+    }
+
+    public function log(string $message)
+    {
+        file_put_contents($this->filePath, $message . PHP_EOL, FILE_APPEND);
+    }
+}