docs: improve Doxygen comments.

refs: #1435

Change-Id: I21624ef4eec393c82a50229a07e8277fb6ae4ddf
diff --git a/src/tlv/adjacency-lsa.hpp b/src/tlv/adjacency-lsa.hpp
index d9c5a73..6ba7d9d 100644
--- a/src/tlv/adjacency-lsa.hpp
+++ b/src/tlv/adjacency-lsa.hpp
@@ -34,16 +34,16 @@
 #include <list>
 
 namespace nlsr {
-namespace tlv  {
+namespace tlv {
 
-/**
- * @brief Data abstraction for AdjacencyLsa
- *
- * AdjacencyLsa := ADJACENCY-LSA-TYPE TLV-LENGTH
- *                   LsaInfo
- *                   Adjacency*
- *
- * @sa http://redmine.named-data.net/projects/nlsr/wiki/LSDB_DataSet
+/*!
+   \brief Data abstraction for AdjacencyLsa
+
+   AdjacencyLsa := ADJACENCY-LSA-TYPE TLV-LENGTH
+                     LsaInfo
+                     Adjacency*
+
+   \sa http://redmine.named-data.net/projects/nlsr/wiki/LSDB_DataSet
  */
 class AdjacencyLsa
 {
diff --git a/src/tlv/adjacency.hpp b/src/tlv/adjacency.hpp
index bf36627..62e6380 100644
--- a/src/tlv/adjacency.hpp
+++ b/src/tlv/adjacency.hpp
@@ -29,17 +29,17 @@
 #include <ndn-cxx/name.hpp>
 
 namespace nlsr {
-namespace tlv  {
+namespace tlv {
 
-/**
- * @brief Data abstraction for Adjacency
- *
- * Adjacency := ADJACENCY-TYPE TLV-LENGTH
- *                Name
- *                Uri
- *                Cost
- *
- * @sa http://redmine.named-data.net/projects/nlsr/wiki/LSDB_DataSet
+/*!
+   \brief Data abstraction for Adjacency
+
+   Adjacency := ADJACENCY-TYPE TLV-LENGTH
+                  Name
+                  Uri
+                  Cost
+
+   \sa http://redmine.named-data.net/projects/nlsr/wiki/LSDB_DataSet
  */
 class Adjacency
 {
diff --git a/src/tlv/coordinate-lsa.hpp b/src/tlv/coordinate-lsa.hpp
index 16bf5aa..f1d8a97 100644
--- a/src/tlv/coordinate-lsa.hpp
+++ b/src/tlv/coordinate-lsa.hpp
@@ -31,17 +31,17 @@
 #include <ndn-cxx/name.hpp>
 
 namespace nlsr {
-namespace tlv  {
+namespace tlv {
 
-/**
- * @brief Data abstraction for CoordinateLsa
- *
- * CoordinateLsa := COORDINATE-LSA-TYPE TLV-LENGTH
- *                    LsaInfo
- *                    HyperbolicRadius
- *                    HyperbolicAngle
- *
- * @sa http://redmine.named-data.net/projects/nlsr/wiki/LSDB_DataSet
+/*!
+   \brief Data abstraction for CoordinateLsa
+
+   CoordinateLsa := COORDINATE-LSA-TYPE TLV-LENGTH
+                      LsaInfo
+                      HyperbolicRadius
+                      HyperbolicAngle
+
+   \sa http://redmine.named-data.net/projects/nlsr/wiki/LSDB_DataSet
  */
 class CoordinateLsa
 {
diff --git a/src/tlv/lsa-info.hpp b/src/tlv/lsa-info.hpp
index 86e33a3..4ea3d67 100644
--- a/src/tlv/lsa-info.hpp
+++ b/src/tlv/lsa-info.hpp
@@ -31,17 +31,17 @@
 #include "lsa.hpp"
 
 namespace nlsr {
-namespace tlv  {
+namespace tlv {
 
-/**
- * @brief Data abstraction for LsaInfo
- *
- * LsaInfo := LSA-TYPE TLV-LENGTH
- *              OriginRouter
- *              SequenceNumber
- *              ExpirationPeriod?
- *
- * @sa http://redmine.named-data.net/projects/nlsr/wiki/LSDB_DataSet
+/*!
+   \brief Data abstraction for LsaInfo
+
+   LsaInfo := LSA-TYPE TLV-LENGTH
+                OriginRouter
+                SequenceNumber
+                ExpirationPeriod?
+
+   \sa http://redmine.named-data.net/projects/nlsr/wiki/LSDB_DataSet
  */
 class LsaInfo
 {
diff --git a/src/tlv/lsdb-status.hpp b/src/tlv/lsdb-status.hpp
index 43aa57d..c911cfd 100644
--- a/src/tlv/lsdb-status.hpp
+++ b/src/tlv/lsdb-status.hpp
@@ -35,17 +35,17 @@
 #include <list>
 
 namespace nlsr {
-namespace tlv  {
+namespace tlv {
 
-/**
- * @brief Data abstraction for LsdbStatus
- *
- * LsdbStatus := LSDB-STATUS-TYPE TLV-LENGTH
- *                 AdjacencyLsa*
- *                 CoordinateLsa*
- *                 NameLsa*
- *
- * @sa http://redmine.named-data.net/projects/nlsr/wiki/LSDB_DataSet
+/*!
+   \brief Data abstraction for LsdbStatus
+
+   LsdbStatus := LSDB-STATUS-TYPE TLV-LENGTH
+                   AdjacencyLsa*
+                   CoordinateLsa*
+                   NameLsa*
+
+   \sa http://redmine.named-data.net/projects/nlsr/wiki/LSDB_DataSet
  */
 class LsdbStatus
 {
diff --git a/src/tlv/name-lsa.hpp b/src/tlv/name-lsa.hpp
index dcfd861..2273abb 100644
--- a/src/tlv/name-lsa.hpp
+++ b/src/tlv/name-lsa.hpp
@@ -33,16 +33,16 @@
 #include <list>
 
 namespace nlsr {
-namespace tlv  {
+namespace tlv {
 
-/**
- * @brief Data abstraction for NameLsa
- *
- * NameLsa := NAME-LSA-TYPE TLV-LENGTH
- *              LsaInfo
- *              Name+
- *
- * @sa http://redmine.named-data.net/projects/nlsr/wiki/LSDB_DataSet
+/*!
+   \brief Data abstraction for NameLsa
+
+   NameLsa := NAME-LSA-TYPE TLV-LENGTH
+                LsaInfo
+                Name+
+
+   \sa http://redmine.named-data.net/projects/nlsr/wiki/LSDB_DataSet
  */
 class NameLsa
 {