v0.2.55..v0.2.56 changeset ElementListener.h

diff --git a/hoot-core/src/main/cpp/hoot/core/elements/ElementListener.h b/hoot-core/src/main/cpp/hoot/core/elements/ElementListener.h
index 99f9861..85b09d2 100644
--- a/hoot-core/src/main/cpp/hoot/core/elements/ElementListener.h
+++ b/hoot-core/src/main/cpp/hoot/core/elements/ElementListener.h
@@ -22,7 +22,7 @@
  * This will properly maintain the copyright information. DigitalGlobe
  * copyrights will be updated automatically.
  *
- * @copyright Copyright (C) 2015, 2018, 2019 DigitalGlobe (http://www.digitalglobe.com/)
+ * @copyright Copyright (C) 2015, 2018, 2019, 2020 DigitalGlobe (http://www.digitalglobe.com/)
  */
 
 #ifndef ELEMENTLISTENER_H
@@ -40,7 +40,8 @@ class ElementListener
 {
 public:
 
-  virtual ~ElementListener() {}
+  ElementListener() = default;
+  virtual ~ElementListener() = default;
 
   virtual void preGeometryChange(Element* element) = 0;