With the migration to Spring it is much stricter in requiring @Transactional for all methods that write to the database. Fixes #22 Co-authored-by: Tom Zhao <tom.zhao@dsv.su.se> Reviewed-on: #23 Reviewed-by: Tom Zhao <tom.zhao@dsv.su.se> Co-authored-by: Andreas Svanberg <andreass@dsv.su.se> Co-committed-by: Andreas Svanberg <andreass@dsv.su.se>