diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 00000000..e69de29b
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 00000000..e69de29b
diff --git a/app/models/dmsf_file_revision.rb b/app/models/dmsf_file_revision.rb
index 7866cb08..eb0eb809 100644
--- a/app/models/dmsf_file_revision.rb
+++ b/app/models/dmsf_file_revision.rb
@@ -180,7 +180,7 @@ class DmsfFileRevision < ActiveRecord::Base
         end
       end
     end
-    filename
+    filename.to_s
   end
 
   def new_storage_filename
diff --git a/test/ci/ci.sh b/test/ci/ci.sh
new file mode 100644
index 00000000..e69de29b
diff --git a/test/ci/mysql.yml b/test/ci/mariadb.yml
similarity index 100%
rename from test/ci/mysql.yml
rename to test/ci/mariadb.yml
diff --git a/test/ci/sqlite.yml b/test/ci/sqlite3.yml
similarity index 100%
rename from test/ci/sqlite.yml
rename to test/ci/sqlite3.yml