added empty configuration definition

DependencyInjection/Configuration.php

@@ -0,0 +1,40 @@
+<?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\DependencyInjection;
+
+use Symfony\Component\Config\Definition\Builder\ArrayNodeDefinition;
+use Symfony\Component\Config\Definition\Builder\TreeBuilder;
+
+/**
+ * WebServiceExtension configuration structure.
+ *
+ * @author Christian Kerl <christian-kerl@web.de>
+ */
+class Configuration
+{
+    /**
+     * Generates the configuration tree.
+     *
+     * @return \Symfony\Component\Config\Definition\ArrayNode The config tree
+     */
+    public function getConfigTree()
+    {
+        $treeBuilder = new TreeBuilder();
+        $rootNode = $treeBuilder->root('webservice');
+
+        $rootNode
+            ->children()
+            ->end()
+        ;
+
+        return $treeBuilder->buildTree();
+    }
+}