[HC05] Added Doxygen comments

src/modules/HC05.h

@@ -3,12 +3,26 @@
 
 #include "ISerial.h"
 
+/*!
+  \class HC05
+
+  \brief Control class for %HC05 module.
+  Most methods supported by this module are implemented in ISerial interface.
+*/
 class HC05: public ISerial {
   public:
-    // constructor
+    /*!
+      \brief Default constructor.
+
+      \param mod Instance of Module that will be used to communicate with the radio.
+    */
     HC05(Module* mod);
 
-    // basic methods
+    /*!
+      \brief Initialization method.
+
+      \param speed Baud rate to use for UART interface.
+    */
     void begin(long speed);
 };