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diff --git a/src/main/java/de/juplo/kafka/StateRepository.java b/src/main/java/de/juplo/kafka/StateRepository.java
new file mode 100644
index 0000000..3129535
--- /dev/null
+++ b/src/main/java/de/juplo/kafka/StateRepository.java
@@ -0,0 +1,11 @@
+package de.juplo.kafka;
+
+import org.springframework.data.mongodb.repository.MongoRepository;
+
+import java.util.Optional;
+
+
+public interface StateRepository extends MongoRepository<StateDocument, String>
+{
+  public Optional<StateDocument> findById(String partition);
+}