usartexception revised

control/src/drv/usartexception.h

@@ -4,32 +4,43 @@
 #include <exception>
 #include <string>
 
-// SOURCE: https://stackoverflow.com/a/8152888
-
 /*! Exception for USART problems, for instance buffer overflow. */
 
 class USARTException: public std::exception
 {
 public:
+    /**
+     * Constructor
+     * @param message as c-string
+     */
     explicit USARTException(const char* message) : msg(message)
     {
     }
 
+    /**
+     * Constructor
+     * @param message as c++-string
+     */
     explicit USARTException(const std::string& message) : msg(message)
     {
     }
 
-    virtual ~USARTException() throw ()
-    {
-    }
+    /**
+     * Standard-destructor
+     */
+    virtual ~USARTException() = default;
 
+    /**
+     * Get failure description
+     * @return error message as c-string
+     */
     virtual const char* what() const throw ()
     {
         return msg.c_str();
     }
 
 protected:
-    std::string msg;
+    std::string msg; //!< failure description
 };
 
 #endif // USARTEXCEPTION_H