Add small checks to avoid possible 'No such file or directory'
-rw-r--r-- 64 .gitreview
-rw-r--r-- 1742 INFO
-rw-r--r-- 624 LICENSE
drwxr-xr-x - commons
drwxr-xr-x - docker
drwxr-xr-x - docs
drwxr-xr-x - testcases