Please Make visit to this link and as i see you are using mars.
1. If you have eclipse marketplace installed then you can proceed as per.

you just need to drag this icon to your eclipse and done.
2. If not Installed then also same link click on download button and after downloading go to eclipse on right side there is search functionality type install new software
and then select that option window will pop up choose>>add button>>archive button>>and upload zip file from download location >>accept agreement and done click on next done.
If you found it easy and helpful please up-vote happy coding and reviewing with sonarlint