tree ec14cb9b9573ebd60d86acc0f8e33758a32ea5ce
parent fea2f1961acd039725db95eb111f62a601503d58
author Weiwei <summerwing10@gmail.com> 1438332181 -0700
committer Weiwei <summerwing10@gmail.com> 1438719442 -0700

add device-related DB storage & DB manager

ref #3069

Change-Id: I8a6c9f7c8c742b082ed92bf44a3afe002257084b