refactor: creating Helper class and moving saveIntoFile function

src/Helper.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace BrunoFontes\Memsource;
+
+class Helper 
+{
+
+    public static function saveIntoFile(string $filename, string $filecontent): void
+    {
+        try {
+            $f = fopen($filename, 'w+');
+            fwrite($f, $filecontent);
+            fclose($f);
+        } catch (\Exception $e) {
+            throw new \Exception("File could not be saved: {$e->error}", 1);
+        }
+    }
+
+}