Add shortcut to Mac dock

How do I add a shortcut for just Writer (version 5) to the dock on Mac? The only thing I have is a shortcut which takes me to the LibreOffice launch window thing. I only want Writer, so would just like a shortcut to that, but I can’t drag it from the window onto the dock or anything. Any ideas?

This question was already answered here for older versions, but the answer is not usable (the question is closed so I can not mention it there). When I store a template I can not find it anywhere in Finder. Also the second step is not possible (I have El Capitan OS ver 10.11.3). If I go to /Applicatons/ and drag it to docker it does not stay there.