Thanks,I found the error above in output.
They are related to trailing spaces and unnecessary tabs, so I solved them.
Thanks again for help.

Shubham

On Mon, May 22, 2017 at 6:57 PM, Shmuel Melamud <smelamud@redhat.com> wrote:
Hi!

On Mon, May 22, 2017 at 4:15 PM, shubham dubey <sdubey504@gmail.com> wrote:
> but after compiling through make I am getting following error
>
> ERROR] Failed to execute goal
> org.apache.maven.plugins:maven-checkstyle-plugin:2.17:check (checkstyle) on
> project common: You have 7 Checkstyle violations. -> [Help 1]
>
> so can anyone tell me what that means?

This a plugin the checks code style (unused imports, wrong spacing etc.).

There should be more messages that explain what exactly is wrong.

Shmuel