diff --git a/catalogue/SchemaCreatingSqliteCatalogue.hpp b/catalogue/SchemaCreatingSqliteCatalogue.hpp
index b34156c8799403265db580eb7d753d992409fdc0..ef540e4dc4e6af300c7f758a17176785ce097fdd 100644
--- a/catalogue/SchemaCreatingSqliteCatalogue.hpp
+++ b/catalogue/SchemaCreatingSqliteCatalogue.hpp
@@ -25,7 +25,7 @@ namespace catalogue {
 class CatalogueFactory;
 
 /**
- * Asbtract CTA catalogue class to be used for unit testing.
+ * CTA catalogue class to be used for unit testing.
  */
 class SchemaCreatingSqliteCatalogue: public SqliteCatalogue {
 public:
diff --git a/catalogue/cta_catalogue_class_diagram.png b/catalogue/cta_catalogue_class_diagram.png
new file mode 100644
index 0000000000000000000000000000000000000000..5413c218bfea0dbec8bf32ab96579c49914e8895
Binary files /dev/null and b/catalogue/cta_catalogue_class_diagram.png differ