Described Export classes.

src/lib/export/adoc.hpp

@@ -29,6 +29,7 @@ namespace Export
 {
     using std::string;
 
+    //! Export as %AsciiDoc document.
     class AsciiDoc : protected ExportBase
     {
     public:

src/lib/export/csv.hpp

@@ -26,6 +26,7 @@ namespace Export
 {
     using std::string;
 
+    //! Export as Comma Separated Values.
     class CSV : protected ExportBase
     {
     public:

src/lib/export/export.hpp

@@ -29,6 +29,7 @@ namespace remwharead
 {
 namespace Export
 {
+    //! Base class for exports.
     class ExportBase
     {
     public: