v0.2.48..v0.2.49 changeset TagMerger.h

diff --git a/hoot-core/src/main/cpp/hoot/core/schema/TagMerger.h b/hoot-core/src/main/cpp/hoot/core/schema/TagMerger.h
index 55da101..553981a 100644
--- a/hoot-core/src/main/cpp/hoot/core/schema/TagMerger.h
+++ b/hoot-core/src/main/cpp/hoot/core/schema/TagMerger.h
@@ -48,6 +48,14 @@ public:
   TagMerger() {}
   virtual ~TagMerger() {}
 
+  /**
+   * Merges two sets of tags into one set.
+   *
+   * @param t1 the first set of tags to merge
+   * @param t2 the second set of tags to merge
+   * @param et the type of element owning the tags being merged
+   * @return a merged set of tags
+   */
   virtual Tags mergeTags(const Tags& t1, const Tags& t2, ElementType et) const = 0;
 };