diff --git a/src/include/List.h b/src/include/List.h
index 0e13f0f9fbb2a3f26ff7326ece2d5d85450a519e..e1544aa860622a09b989bb568cc13d059c69d6bb 100644
--- a/src/include/List.h
+++ b/src/include/List.h
@@ -12,7 +12,12 @@
  */
 class ListOutOfBoundsException: public std::exception {
 protected:
-	int min_index, max_index, requested_index;
+	//! \brief Minimum index defined in the list.
+	int min_index;
+	//! \brief Maximum index defined in the list.
+	int max_index;
+	//! \brief Index requested by user.
+	int requested_index;
 
 public:
 	/**