v0.2.55..v0.2.56 changeset ConflatableElementCriterion.h

diff --git a/hoot-core/src/main/cpp/hoot/core/criterion/ConflatableElementCriterion.h b/hoot-core/src/main/cpp/hoot/core/criterion/ConflatableElementCriterion.h
index d1145d1..c8e7dc1 100644
--- a/hoot-core/src/main/cpp/hoot/core/criterion/ConflatableElementCriterion.h
+++ b/hoot-core/src/main/cpp/hoot/core/criterion/ConflatableElementCriterion.h
@@ -38,6 +38,8 @@ namespace hoot
  * Simple abstract base class that signifies an ElementCriterion that describes a conflatable
  * feature type; e.g. BuildingCriterion.  All ElementCriterion used for identifying conflatable
  * features should inherit from this class
+ *
+ * TODO: Think we combine this class with NonConflatableCriterion.
  */
 class ConflatableElementCriterion : public GeometryTypeCriterion
 {
@@ -45,7 +47,8 @@ public:
 
   static std::string className() { return "hoot::ConflatableElementCriterion"; }
 
-  virtual ~ConflatableElementCriterion() {}
+  ConflatableElementCriterion() = default;
+  virtual ~ConflatableElementCriterion() = default;
 
   /**
    * Determines whether the criterion represents an element conflatable by a specific machine