SWDEV-448163 - Fix doxygen warnings

This is a first batch of doxygen warnings fixes.

Signed-off-by: Sebastian Luzynski <Sebastian.Luzynski@amd.com>
Change-Id: Iba81d08b15738f80d86626113026e8a7e9cab42b

catch/unit/event/hipEventCreateWithFlags.cc

@@ -347,4 +347,10 @@ TEST_CASE("Unit_hipEventCreateWithFlags_DefaultFlg_CohHstMem") {
     eMemoryToTest::eCoherentHostMemory, hipEventDefault);
   }
 }
+
+/**
+ * End doxygen group hipEventCreateWithFlags.
+ * @}
+ */
+
 #endif