diff -r 51d14b0c68c0 -r 2bdc3ac5e77c src/modelobject.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/modelobject.cpp	Sat Aug 24 14:44:42 2019 +0300
@@ -0,0 +1,22 @@
+#include "modelobject.h"
+
+static Uuid &getUuidForNewObject()
+{
+    static Uuid running_uuid {0, 0};
+    incrementUuid(running_uuid);
+    return running_uuid;
+}
+
+ModelObject::ModelObject() :
+    id {getUuidForNewObject()}
+{
+}
+
+ModelObject::~ModelObject()
+{
+}
+
+
+Comment::Comment(QStringView text) :
+    ModelObject{},
+    storedText{text} {}