diff --git a/lib/ronin/core/output_formats/output_format.rb b/lib/ronin/core/output_formats/output_format.rb
index ab41364..ecd2d56 100644
--- a/lib/ronin/core/output_formats/output_format.rb
+++ b/lib/ronin/core/output_formats/output_format.rb
@@ -42,6 +42,13 @@ def <<(value)
           raise(NotImplementedError,"#{self.class}#<< was not implemented")
         end
 
+        #
+        # Closes the output file. Needs to be defined
+        # in a child class.
+        #
+        def close
+        end
+
       end
     end
   end