i think i have, if you look at my last post, but every minute do not seemed to work.
while i was writing this post, i refreshed the database to see last values
the persistence file was updated at
you can see, everyMinute is not working, and i do not have erros in openhab.log.
Additional Info
every item, that i want to persist, is member of this group, i added the item(s) door_sw* additional - there comes an idea to my mind: could it be, that door_sw* only works for groups and not for single items?