diff -r 68988ebc2a68 -r 593a658cba8e src/documentmanager.cpp
--- a/src/documentmanager.cpp	Mon Sep 23 14:06:36 2019 +0300
+++ b/src/documentmanager.cpp	Thu Oct 03 11:45:44 2019 +0300
@@ -1,5 +1,10 @@
 #include "documentmanager.h"
 
+DocumentManager::DocumentManager(QObject* parent) :
+	QObject{parent}
+{
+}
+
 Model* DocumentManager::newModel()
 {
 	openModels.emplace_back();