Fixed some javadoc

src/main/java/beamline/events/BEvent.java

...ava/beamline/models/algorithms/StreamMiningAlgorithm.java

...va/beamline/models/responses/DirectlyFollowsRelation.java

src/main/java/beamline/sources/BeamlineAbstractSource.java

src/main/java/beamline/sources/CSVLogSource.java

src/main/java/beamline/sources/XesLogSource.java

src/main/java/beamline/sources/package-info.java