diff --git a/src/lib/export/adoc.hpp b/src/lib/export/adoc.hpp
index c861296..9913b71 100644
--- a/src/lib/export/adoc.hpp
+++ b/src/lib/export/adoc.hpp
@@ -29,6 +29,7 @@ namespace Export
 {
     using std::string;
 
+    //! Export as %AsciiDoc document.
     class AsciiDoc : protected ExportBase
     {
     public:
diff --git a/src/lib/export/csv.hpp b/src/lib/export/csv.hpp
index c0259bc..a27a614 100644
--- a/src/lib/export/csv.hpp
+++ b/src/lib/export/csv.hpp
@@ -26,6 +26,7 @@ namespace Export
 {
     using std::string;
 
+    //! Export as Comma Separated Values.
     class CSV : protected ExportBase
     {
     public:
diff --git a/src/lib/export/export.hpp b/src/lib/export/export.hpp
index 737708e..e060bbb 100644
--- a/src/lib/export/export.hpp
+++ b/src/lib/export/export.hpp
@@ -29,6 +29,7 @@ namespace remwharead
 {
 namespace Export
 {
+    //! Base class for exports.
     class ExportBase
     {
     public: