* Make streams polymorphic

include/Athena/BinaryReader.hpp

@@ -48,7 +48,7 @@ public:
      */
     BinaryReader(const std::string& filename, std::function<void(int)> progressFun = nullptr);
 
-    ~BinaryReader();
+    virtual ~BinaryReader();
 
     /*! \brief Sets the Endianss of the stream
      *

include/Athena/BinaryWriter.hpp

@@ -49,7 +49,7 @@ public:
      */
     BinaryWriter(const std::string& filename, std::function<void(int)> progressFun = nullptr);
 
-    ~BinaryWriter();
+    virtual ~BinaryWriter();
 
     /*! \brief Sets the Endianss of the stream
      *

include/Athena/FileReader.hpp

@@ -28,7 +28,7 @@ class FileReader : public Stream
 {
 public:
     FileReader(const std::string& filename);
-    ~FileReader();
+    virtual ~FileReader();
     std::string filename() const;
 
     void setEndian(Endian endian);

include/Athena/FileWriter.hpp

@@ -26,7 +26,7 @@ class FileWriter : public Stream
 {
 public:
     FileWriter(const std::string& filename);
-    ~FileWriter();
+    virtual ~FileWriter();
 
     void setEndian(Endian endian);
     Endian endian() const;

include/Athena/Stream.hpp

@@ -28,7 +28,7 @@ std::ostream& operator<<(std::ostream& os, Endian& endian);
 class Stream
 {
 public:
-
+    virtual Stream() {}
 
     virtual void setEndian(Endian)    = 0;
     virtual Endian endian()      const= 0;