Add Log-Level setters and fix some javadocs

[luepges]

No description provided.

[github-actions]

✔️ Changes pass the MontiVerse

Project	Status

details

Project	Status
montiarc	✅
umlp_experiments	✅
umlp_tool	✅
sd	✅
montifun	✅
fd	✅
automaton	✅
sc	✅
guidsl	✅
artifacts	✅
ocl	✅
od	✅
ucd	✅
langexperiments	✅
json	✅
xml	✅
cd2gui	✅
mlc	✅
cd4analysis	✅
monticore_basic	✅

The MontiVerse is a collection of (internal and public) language projects.

[SE-FDr]

As a Lite variant instead of a proper solution, this should do.