v0.2.55..v0.2.56 changeset HausdorffDistanceExtractor.h

diff --git a/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/HausdorffDistanceExtractor.h b/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/HausdorffDistanceExtractor.h
index 8d5d858..3783af3 100644
--- a/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/HausdorffDistanceExtractor.h
+++ b/hoot-core/src/main/cpp/hoot/core/algorithms/extractors/HausdorffDistanceExtractor.h
@@ -23,7 +23,7 @@
  * copyrights will be updated automatically.
  *
  * @copyright Copyright (C) 2005 VividSolutions (http://www.vividsolutions.com/)
- * @copyright Copyright (C) 2015, 2017, 2018, 2019 DigitalGlobe (http://www.digitalglobe.com/)
+ * @copyright Copyright (C) 2015, 2017, 2018, 2019, 2020 DigitalGlobe (http://www.digitalglobe.com/)
  */
 #ifndef HAUSDORFFDISTANCEMATCHER_H
 #define HAUSDORFFDISTANCEMATCHER_H
@@ -47,6 +47,9 @@ class HausdorffDistanceExtractor : public AbstractDistanceExtractor
 public:
   static std::string className() { return "hoot::HausdorffDistanceExtractor"; }
 
+  HausdorffDistanceExtractor() = default;
+  virtual ~HausdorffDistanceExtractor() = default;
+
   virtual double distance(const OsmMap& map, const std::shared_ptr<const Element>& target,
     const std::shared_ptr<const Element>& candidate) const override;