Pls help : rList-com files in /data/data What is this ???? topic

PLS help !!!

Today I've recognise, that there are in different subfolders from /data/data/com<subfolfername>/files are add. files are available.
All the files starts with rList-com.<partof subfolder_name + Activity >

E.g.
path
/data/datacom.google.android.apps.plus/files
??? File :
rList-com.google.android.apps.plus.phone.CirclesMembersh ipActivity
rList-com.google.android.apps.plus.phone.phone.EditComme ntActivity
rList-com.google.android.apps.plus.phone.HomeActivity
and and and

I've never recognise this files in history

From where does this kind of files are comming?
Who create this one and for which reason ?
All the files are in a normal writeprotected system area !