Updated javadoc comments

diff --git a/src/main/java/de/ids_mannheim/korap/query/spans/UnorderedElementDistanceSpans.java b/src/main/java/de/ids_mannheim/korap/query/spans/UnorderedElementDistanceSpans.java
index 102b5c9..f0df28e 100644
--- a/src/main/java/de/ids_mannheim/korap/query/spans/UnorderedElementDistanceSpans.java
+++ b/src/main/java/de/ids_mannheim/korap/query/spans/UnorderedElementDistanceSpans.java
@@ -34,7 +34,7 @@
     private List<CandidateSpan> elementList;
 
     /**
-     * Constructs an UnorderedElementDistanceSpans for the given
+     * Constructs UnorderedElementDistanceSpans for the given
      * {@link SpanDistanceQuery}.
      * 
      * @param query a SpanDistanceQuery