Index: trunk/EventBenchCore/src/de/ugoe/cs/eventbench/coverage/CoverageCalculator.java
===================================================================
--- trunk/EventBenchCore/src/de/ugoe/cs/eventbench/coverage/CoverageCalculator.java	(revision 81)
+++ trunk/EventBenchCore/src/de/ugoe/cs/eventbench/coverage/CoverageCalculator.java	(revision 85)
@@ -94,5 +94,5 @@
 		Set<List<Event<?>>> subSequenceSet = new LinkedHashSet<List<Event<?>>>();;
 		if( length<1 ) {
-			throw new InvalidParameterException(); // TODO comment
+			throw new InvalidParameterException("Length of generated subsequences must be at least 1.");
 		}
 		if( length==1 ) {