COMPMID-1008: Fix Doxygen issues

Change-Id: Ie73d8771f85d1f5b059f3a56f1bbd73c98e94a38
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/124723
Reviewed-by: Michalis Spyrou <michalis.spyrou@arm.com>
Tested-by: Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/graph2/frontend/ILayer.h b/arm_compute/graph2/frontend/ILayer.h
index fee0b37..f8f6a5d 100644
--- a/arm_compute/graph2/frontend/ILayer.h
+++ b/arm_compute/graph2/frontend/ILayer.h
@@ -33,11 +33,18 @@
 // Forward declarations
 class IStream;
 
-/** ILayer interface **/
+/** ILayer interface */
 class ILayer
 {
 public:
-    virtual ~ILayer()                       = default;
+    /** Default destructor */
+    virtual ~ILayer() = default;
+    /** Create layer and add to the given stream.
+     *
+     * @param[in] s Stream to add layer to.
+     *
+     * @return ID of the created node.
+     */
     virtual NodeID create_layer(IStream &s) = 0;
 };
 } // namespace frontend