diff -r 2bdc3ac5e77c -r 55a55a9ec2c2 src/documentmanager.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/documentmanager.h	Sun Sep 22 11:51:41 2019 +0300
@@ -0,0 +1,16 @@
+#pragma once
+#include "main.h"
+#include "model.h"
+
+class DocumentManager
+{
+public:
+	DocumentManager() = default;
+	DocumentManager(const DocumentManager&) = delete;
+	DocumentManager(DocumentManager&&) = default;
+	DocumentManager& operator=(const DocumentManager&) = delete;
+	DocumentManager& operator=(DocumentManager&&) = default;
+	Model* newModel();
+private:
+	std::vector<std::unique_ptr<Model>> openModels;
+};