i've got an issue with the namespace initialization in the Namespace class,
loadBaseData method - there are many transactional stuff that i do not
completely understand, and this doesn't work with a non transactional database,
since some transactions need to be rollbacked when the root object is already
created. i just kept the first begin and last commit, and removed the try catch
around the root creation - that works fine, data are well loaded the first time
you start your app.