diff -r 68443f5be176 -r 44679e468ba9 src/documentmanager.h
--- a/src/documentmanager.h	Sat Oct 05 23:47:03 2019 +0300
+++ b/src/documentmanager.h	Sun Nov 03 12:17:41 2019 +0200
@@ -5,13 +5,18 @@
 class DocumentManager : public QObject
 {
 	Q_OBJECT
+	using ModelPointer = std::unique_ptr<Model>;
 public:
 	DocumentManager(QObject* parent = nullptr);
 	DocumentManager(const DocumentManager&) = delete;
 	DocumentManager(DocumentManager&&) = default;
 	DocumentManager& operator=(const DocumentManager&) = delete;
 	DocumentManager& operator=(DocumentManager&&) = default;
-	Model* newModel();
+	QString newModel();
+	Model* findModelByName(const QString& name);
+	QString openModel(const QString& path, QTextStream& errorStream);
+	QString makeNewModelName();
 private:
-	std::vector<std::unique_ptr<Model>> openModels;
+	int untitledNameCounter = 0;
+	std::map<QString, ModelPointer> openModels;
 };