added initial implementation of WsdlFileDumper based on Zend Wsdl class

ServiceDefinition/Dumper/FileDumper.php

@@ -0,0 +1,30 @@
+<?php
+/*
+ * This file is part of the WebServiceBundle.
+ *
+ * (c) Christian Kerl <christian-kerl@web.de>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace Bundle\WebServiceBundle\ServiceDefinition\Dumper;
+
+use Bundle\WebServiceBundle\ServiceDefinition\Dumper\DumperInterface;
+use Bundle\WebServiceBundle\Util\Assert;
+
+/**
+ *
+ * @author Christian Kerl <christian-kerl@web.de>
+ */
+abstract class FileDumper implements DumperInterface
+{
+    protected $file;
+
+    public function __construct($file)
+    {
+        Assert::thatArgumentNotNull('file', $file);
+
+        $this->file = $file;
+    }
+}