DataviewExtensionHook: just a new hook

modules/monitoring/library/Monitoring/Hook/DataviewExtensionHook.php

@@ -0,0 +1,9 @@
+<?php
+/* Icinga Web 2 | (c) 2013-2015 Icinga Development Team | GPLv2+ */
+
+namespace Icinga\Module\Monitoring\Hook;
+
+abstract class DataviewExtensionHook
+{
+    abstract public function getAdditionalQueryColumns($queryName);
+}