diff -r 68988ebc2a68 -r 593a658cba8e src/documentmanager.h
--- a/src/documentmanager.h	Mon Sep 23 14:06:36 2019 +0300
+++ b/src/documentmanager.h	Thu Oct 03 11:45:44 2019 +0300
@@ -2,10 +2,11 @@
 #include "main.h"
 #include "model.h"
 
-class DocumentManager
+class DocumentManager : public QObject
 {
+	Q_OBJECT
 public:
-	DocumentManager() = default;
+	DocumentManager(QObject* parent = nullptr);
 	DocumentManager(const DocumentManager&) = delete;
 	DocumentManager(DocumentManager&&) = default;
 	DocumentManager& operator=(const DocumentManager&) = delete;