diff --git a/api/src/main/java/io/github/pavansharma36/workflow/api/adapter/base/BaseAdapter.java b/api/src/main/java/io/github/pavansharma36/workflow/api/adapter/base/BaseAdapter.java
index 53490fc..f2f1fa4 100644
--- a/api/src/main/java/io/github/pavansharma36/workflow/api/adapter/base/BaseAdapter.java
+++ b/api/src/main/java/io/github/pavansharma36/workflow/api/adapter/base/BaseAdapter.java
@@ -1,7 +1,6 @@
 package io.github.pavansharma36.workflow.api.adapter.base;
 
 import io.github.pavansharma36.workflow.api.adapter.Adapter;
-import io.github.pavansharma36.workflow.api.serde.Serde;
 import io.github.pavansharma36.workflow.api.util.PollDelayGenerator;
 import lombok.AccessLevel;
 import lombok.RequiredArgsConstructor;
diff --git a/api/src/main/java/io/github/pavansharma36/workflow/api/adapter/base/BasePersistenceAdapter.java b/api/src/main/java/io/github/pavansharma36/workflow/api/adapter/base/BasePersistenceAdapter.java
index 24babf0..8c62ccc 100644
--- a/api/src/main/java/io/github/pavansharma36/workflow/api/adapter/base/BasePersistenceAdapter.java
+++ b/api/src/main/java/io/github/pavansharma36/workflow/api/adapter/base/BasePersistenceAdapter.java
@@ -3,9 +3,6 @@
 import io.github.pavansharma36.workflow.api.adapter.PersistenceAdapter;
 import io.github.pavansharma36.workflow.api.adapter.WorkflowAdapter;
 import io.github.pavansharma36.workflow.api.model.ManagerInfo;
-import io.github.pavansharma36.workflow.api.serde.Deserializer;
-import io.github.pavansharma36.workflow.api.serde.Serde;
-import io.github.pavansharma36.workflow.api.serde.Serializer;
 import io.github.pavansharma36.workflow.api.util.PollDelayGenerator;
 import java.util.Date;
 import java.util.List;
diff --git a/api/src/main/java/io/github/pavansharma36/workflow/api/adapter/builder/BaseAdapterBuilder.java b/api/src/main/java/io/github/pavansharma36/workflow/api/adapter/builder/BaseAdapterBuilder.java
index 15f18dd..448f029 100644
--- a/api/src/main/java/io/github/pavansharma36/workflow/api/adapter/builder/BaseAdapterBuilder.java
+++ b/api/src/main/java/io/github/pavansharma36/workflow/api/adapter/builder/BaseAdapterBuilder.java
@@ -1,8 +1,8 @@
 package io.github.pavansharma36.workflow.api.adapter.builder;
 
 import io.github.pavansharma36.workflow.api.adapter.Adapter;
-import io.github.pavansharma36.workflow.api.serde.jackson.JacksonSerde;
 import io.github.pavansharma36.workflow.api.serde.Serde;
+import io.github.pavansharma36.workflow.api.serde.jackson.JacksonSerde;
 import io.github.pavansharma36.workflow.api.util.FixedPollDelayGenerator;
 import io.github.pavansharma36.workflow.api.util.PollDelayGenerator;
 import io.github.pavansharma36.workflow.api.util.WorkflowException;
diff --git a/jedis/src/main/java/io/github/pavansharma36/workflow/jedis/adapter/builder/JedisWorkflowAdapterBuilder.java b/jedis/src/main/java/io/github/pavansharma36/workflow/jedis/adapter/builder/JedisWorkflowAdapterBuilder.java
index 11f8fb7..513fcb1 100644
--- a/jedis/src/main/java/io/github/pavansharma36/workflow/jedis/adapter/builder/JedisWorkflowAdapterBuilder.java
+++ b/jedis/src/main/java/io/github/pavansharma36/workflow/jedis/adapter/builder/JedisWorkflowAdapterBuilder.java
@@ -2,8 +2,8 @@
 
 import io.github.pavansharma36.workflow.api.adapter.WorkflowAdapter;
 import io.github.pavansharma36.workflow.api.adapter.builder.WorkflowAdapterBuilder;
-import io.github.pavansharma36.workflow.api.serde.jackson.JacksonSerde;
 import io.github.pavansharma36.workflow.api.serde.Serde;
+import io.github.pavansharma36.workflow.api.serde.jackson.JacksonSerde;
 import lombok.AccessLevel;
 import lombok.NoArgsConstructor;
 import redis.clients.jedis.JedisPool;
diff --git a/mongodb/src/main/java/io/github/pavansharma36/workflow/mongodb/migration/PersistenceMigration.java b/mongodb/src/main/java/io/github/pavansharma36/workflow/mongodb/migration/PersistenceMigration.java
index 2c06921..392cdfe 100644
--- a/mongodb/src/main/java/io/github/pavansharma36/workflow/mongodb/migration/PersistenceMigration.java
+++ b/mongodb/src/main/java/io/github/pavansharma36/workflow/mongodb/migration/PersistenceMigration.java
@@ -12,6 +12,9 @@
 import org.bson.BsonInt32;
 import org.bson.Document;
 
+/**
+ * migration to create indexes in mongo for mongopersistenceadapter.
+ */
 @RequiredArgsConstructor
 public class PersistenceMigration implements Runnable {
 
@@ -46,13 +49,11 @@ private void managerInfo() {
   private void taskInfo() {
     List<IndexModel> indexes = new LinkedList<>();
 
-    indexes.add(new IndexModel(new BsonDocument().append(MongoDbQueryHelper.TaskInfo.RUN_ID_KEY,
-        new BsonInt32(1)),
-        new IndexOptions().background(true).name("task_info_run_id_idx")));
-    indexes.add(new IndexModel(new BsonDocument().append(MongoDbQueryHelper.TaskInfo.RUN_ID_KEY,
-            new BsonInt32(1))
+    indexes.add(new IndexModel(new BsonDocument().append(
+            MongoDbQueryHelper.TaskInfo.RUN_ID_KEY, new BsonInt32(1))
         .append(MongoDbQueryHelper.TaskInfo.TASK_ID_KEY, new BsonInt32(1)),
-        new IndexOptions().background(true).name("task_info_run_id_task_id_unique_idx").unique(true)));
+        new IndexOptions().background(true)
+                .name("task_info_run_id_task_id_unique_idx").unique(true)));
 
     collection(MongoDbQueryHelper.TaskInfo.collectionName(namespace))
         .createIndexes(indexes);