docs: Update documentation and Doxygen documentation generation
diff --git a/model/fib/ndn-fib.h b/model/fib/ndn-fib.h
index 490cdfd..b5e8e40 100644
--- a/model/fib/ndn-fib.h
+++ b/model/fib/ndn-fib.h
@@ -33,8 +33,13 @@
 typedef Interest InterestHeader;
 
 /**
- * \ingroup ndn
- * \brief Class implementing FIB functionality
+ * @ingroup ndn
+ * @defgroup ndn-fib FIB
+ */
+
+/**
+ * @ingroup ndn-fib
+ * @brief Class implementing FIB functionality
  */
 class Fib : public Object
 {