How to add a libreoffice launcher for writer?
As of version 6, in the OsX version of LibreOffice there are NOT separate applications to be run.

It is possible is to create a "launcher" for each LibreOffice components, for example with Applescript, and then to add the resulting app to the Dock or in the Applications Folder -to be indexed by spotlight.

The single line Applescript:

do shell script "/Applications/LibreOffice.app/Contents/MacOS/soffice --writer &amp;&gt; /dev/null &amp;

launches Writer (to launch the other components you use their names instead of writer, that is --calc, --impress, --draw, --base, or --math)

Save the Applescript as an app, and even change its icon (you can google for Libre Office icons or you can search for them http://www.iconarchive.com) and the "illusion" is complete