allow api methods whitelisting

src/Webservice/Exception/ConfigException.php

@@ -0,0 +1,12 @@
+<?php
+
+namespace Bsr\Webservice\Exception;
+
+/**
+ * This exception should be raised by the WebService engine when
+ * there is an error in the provided configuration information.
+ *
+ * @package Bsr\Webservice\Exception
+ */
+class ConfigException extends \Exception {
+}