Questions regarding my first Isis application

[Miguel Payet]

Hello, I have a question:

Is is possible to persist an object only after editing it? I have an
action like this, but am unable to make the object persistent after
editing and pressing the "OK" button.

        @ActionLayout(bookmarking = BookmarkPolicy.NEVER, named =
        "Create timesheet")
        @MemberOrder(sequence = "1")
        public Timesheet create() {
                final Timesheet obj =
                container.newTransientInstance(Timesheet.class);
                return obj;
        }

Thanks for your help.

Miguel