fix javadoc

Author: Vladimir Kotal

opengrok-indexer/src/main/java/org/opengrok/indexer/history/History.java

@@ -120,6 +120,8 @@ public boolean hasTags() {
 
     /**
      * Gets a value indicating if {@code file} is in the list of renamed files.
+     * @param file file path
+     * @return is file renamed
      */
     public boolean isRenamed(String file) {
         return renamedFiles.contains(file);