Add new methods getLog, deleteRecords, deleteEntry

Change-Id: I4d7e636f537b84d8b03fa9f2b7bd2718fc109743
Change implemented entity manager now from outside

Change-Id: I9a921f287694399bcc78c058fd6c6445649d130f
Add a abstract form class

Change-Id: I11ef9b785a607829a400c4f31d19c3aae1e1a2fa