[[bonita-tasks]] [Task #2962] Core simplification

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Task #2962 has been updated. 

Project: Bonita
Subproject: Nova Bonita 4.0
Summary: Core simplification
Complete: 0%
Status: Open

Description: Have a look at interfaces in core :
Querier, Journal, Repository, PersistenceService, APIs...and check if can do 
something easier to maitain
Currently, one modification in one of these interfaces implies a lot of 
modifications at other places

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For more info, visit:

http://forge.objectweb.org/pm/task.php?func=detailtask&project_task_id=2962&group_id=56&group_project_id=199