Initial Payment Entity

Change-Id: If9facc4e0ecd675b2beeaee59c8604d61251c435
Initial Check Entity

Change-Id: I23c6bfbf36424d86332b6ad90098179bdd268d8f
Initial Credit Entity

Change-Id: I76f7cff3800a6020b1d0e6fa32a9d60fafc9cff2