2 files changed, 8 insertions, 0 deletions
diff --git a/searchlib/src/vespa/searchlib/test/vector_buffer_reader.h b/searchlib/src/vespa/searchlib/test/vector_buffer_reader.h
index b608e0c7259..d9b1353270b 100644
--- a/searchlib/src/vespa/searchlib/test/vector_buffer_reader.h
+++ b/searchlib/src/vespa/searchlib/test/vector_buffer_reader.h
@@ -10,6 +10,10 @@
 namespace search::test
 {
 
+/*
+ * Class used by hnsw graph/index unit tests to load hnsw index from a
+ * vector.
+ */
 class VectorBufferReader {
 private:
     const std::vector<char>& _data;
diff --git a/searchlib/src/vespa/searchlib/test/vector_buffer_writer.h b/searchlib/src/vespa/searchlib/test/vector_buffer_writer.h
index e3d88cb507d..244c675c567 100644
--- a/searchlib/src/vespa/searchlib/test/vector_buffer_writer.h
+++ b/searchlib/src/vespa/searchlib/test/vector_buffer_writer.h
@@ -8,6 +8,10 @@
 namespace search::test
 {
 
+/*
+ * Class used by hnsw graph/index unit tests to save hnsw index to a
+ * vector.
+ */
 class VectorBufferWriter : public BufferWriter {
 private:
     char tmp[1024];