first indicator for calendar exports

src/Bundle/ChillCalendarBundle/Export/Declarations.php

@@ -0,0 +1,20 @@
+<?php
+
+/**
+ * Chill is a software for social workers
+ *
+ * For the full copyright and license information, please view
+ * the LICENSE file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Chill\CalendarBundle\Export;
+
+/**
+ * This class declare constants used for the export framework.
+ */
+abstract class Declarations
+{
+    public const CALENDAR_TYPE = 'calendar';
+}