Doxygen: Add @file items for the relevant files.

These short descriptions are shown in the "Files" section of the
Doxygen output.

1 files changed, 6 insertions, 0 deletions

diff --git a/decoder.c b/decoder.c
index 52c913a..34e3d95 100644
--- a/decoder.c
+++ b/decoder.c
@@ -23,6 +23,12 @@
 #include "sigrokdecode-internal.h"
 #include <glib.h>
 
+/**
+ * @file
+ *
+ * Listing, loading, unloading, and handling protocol decoders.
+ */
+
 /** @cond PRIVATE */
 
 /* The list of protocol decoders. */