v0.2.55..v0.2.56 changeset DataSamples.h

diff --git a/hoot-core/src/main/cpp/hoot/core/scoring/DataSamples.h b/hoot-core/src/main/cpp/hoot/core/scoring/DataSamples.h
index 9126478..89883f7 100644
--- a/hoot-core/src/main/cpp/hoot/core/scoring/DataSamples.h
+++ b/hoot-core/src/main/cpp/hoot/core/scoring/DataSamples.h
@@ -22,7 +22,7 @@
  * This will properly maintain the copyright information. DigitalGlobe
  * copyrights will be updated automatically.
  *
- * @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 DATASAMPLES_H
@@ -48,7 +48,8 @@ class DataSamples : public std::vector<Sample>
 {
 public:
 
-  DataSamples();
+  DataSamples() = default;
+  virtual ~DataSamples() = default;
 
   std::vector<std::string> getUniqueLabels() const;