Creation of javadocs reports warnings

[errantlinguist]

When creating javadocs for the different (sub-)projects, a number of warnings are thrown due to malformed comments, e.g.

[WARNING] Javadoc Warnings
[WARNING] /home/local/UKP/shore/src/com.github.errantlinguist/dkpro-argumentation/de.tudarmstadt.ukp.dkpro.argumentation.preprocessing/src/main/java/de/tudarmstadt/ukp/dkpro/argumentation/preprocessing/annotation/ArgumentSimplifiedTokenBIOAnnotator.java:80: warning: no description for @throws
[WARNING] * @throws AnalysisEngineProcessException
[WARNING] ^
[WARNING] /home/local/UKP/shore/src/com.github.errantlinguist/dkpro-argumentation/de.tudarmstadt.ukp.dkpro.argumentation.preprocessing/src/main/java/de/tudarmstadt/ukp/dkpro/argumentation/preprocessing/annotation/ArgumentSimplifiedTokenBIOAnnotator.java:140: warning: no description for @throws
[WARNING] * @throws AnalysisEngineProcessException
[WARNING] ^

These comments should be fixed so that the javadoc generator doesn't throw any warnings (which might hide other, more dangerous warnings due to their frequency).

[errantlinguist]

Many of these warnings have been fixed in the fork to be pulled in pull request no. 20.