diff --git a/process_bigraph/__init__.py b/process_bigraph/__init__.py
index 421e4b0..1d636ff 100644
--- a/process_bigraph/__init__.py
+++ b/process_bigraph/__init__.py
@@ -2,7 +2,7 @@
 from process_bigraph.type_system import types
 from process_bigraph.protocols import local_lookup
 from process_bigraph.registry import protocol_registry, process_registry
-from process_bigraph.emitter import ConsoleEmitter, RAMEmitter
+from process_bigraph.emitter import ConsoleEmitter, RAMEmitter, DatabaseEmitter
 
 
 # register protocols
@@ -12,4 +12,5 @@
 # TODO
 process_registry.register('console-emitter', ConsoleEmitter)
 process_registry.register('ram-emitter', RAMEmitter)
+process_registry.register('database-emitter', DatabaseEmitter)