javadoc is historicly very finicky about relative names in @link tags when the name doesn't resolve in the class hierarchy at the current accesse level (ie: even if a class is in the same package, an @link to it's short namewon't resolve if it's not actaully part of a signature for a method/field being documented)
lucene/java/trunk/contrib/analyzers/common/src/java/org/apache/lucene/analysis/ru/RussianStemFilter.java