Index: src/java/org/apache/lucene/search/SpanFilter.java
===================================================================
--- src/java/org/apache/lucene/search/SpanFilter.java	(revision 560818)
+++ src/java/org/apache/lucene/search/SpanFilter.java	(working copy)
@@ -27,7 +27,7 @@
  and then you entered a new SpanQuery containing bar, you could not only filter by the word foo, but you could
  then compare position information for post processing.
  */
-public abstract class SpanFilter extends Filter{
+public abstract class SpanFilter {
   /** Returns a SpanFilterResult with true for documents which should be permitted in
     search results, and false for those that should not and Spans for where the true docs match.
    * @param reader The {@link org.apache.lucene.index.IndexReader} to load position and bitset information from