v0.2.55..v0.2.56 changeset ComparatorTagDifferencer.h

diff --git a/hoot-core/src/main/cpp/hoot/core/schema/ComparatorTagDifferencer.h b/hoot-core/src/main/cpp/hoot/core/schema/ComparatorTagDifferencer.h
index b8ad509..4ee6d05 100644
--- a/hoot-core/src/main/cpp/hoot/core/schema/ComparatorTagDifferencer.h
+++ b/hoot-core/src/main/cpp/hoot/core/schema/ComparatorTagDifferencer.h
@@ -41,6 +41,9 @@ public:
 
   static std::string className() { return "hoot::ComparatorTagDifferencer"; }
 
+  ComparatorTagDifferencer() = default;
+  virtual ~ComparatorTagDifferencer() = default;
+
   virtual double diff(const ConstOsmMapPtr& map, const ConstElementPtr& e1,
     const ConstElementPtr& e2) const override;
 };