diff --git a/processor/src/main/java/one/nem/lacerta/processor/DocumentProcessor.java b/processor/src/main/java/one/nem/lacerta/processor/DocumentProcessor.java
new file mode 100644
index 00000000..4e6631e6
--- /dev/null
+++ b/processor/src/main/java/one/nem/lacerta/processor/DocumentProcessor.java
@@ -0,0 +1,4 @@
+package one.nem.lacerta.processor;
+
+public interface DocumentProcessor {
+}