diff --git a/cool-core/src/main/java/com/nus/cool/core/cohort/CohortProcessor.java b/cool-core/src/main/java/com/nus/cool/core/cohort/CohortProcessor.java
index 9deb7c7f..8eb8bb2b 100644
--- a/cool-core/src/main/java/com/nus/cool/core/cohort/CohortProcessor.java
+++ b/cool-core/src/main/java/com/nus/cool/core/cohort/CohortProcessor.java
@@ -234,7 +234,8 @@ private void processTuple(MetaChunkRS metaChunk) {
       return;
     }
 
-    LocalDateTime actionTime = DateUtils.secondsSinceEpoch(tuple.getValueBySchema(this.actionTimeSchema).getInt());
+    LocalDateTime actionTime = DateUtils.secondsSinceEpoch(
+        tuple.getValueBySchema(this.actionTimeSchema).getInt());
     // check whether its birthEvent is selected
     if (!this.birthSelector.isUserSelected(userId)) {
       boolean selected = this.birthSelector.selectEvent(userId, actionTime, this.tuple);
diff --git a/cool-core/src/main/java/com/nus/cool/core/cohort/ResultType.java b/cool-core/src/main/java/com/nus/cool/core/cohort/ResultType.java
index 5871edcf..c63e4f4c 100644
--- a/cool-core/src/main/java/com/nus/cool/core/cohort/ResultType.java
+++ b/cool-core/src/main/java/com/nus/cool/core/cohort/ResultType.java
@@ -3,7 +3,7 @@
 import com.fasterxml.jackson.annotation.JsonCreator;
 import com.fasterxml.jackson.annotation.JsonValue;
 
-/** Enum for result type */
+/** Enum for result type. */
 public enum ResultType {
   FLOAT("FLOAT"), INT("INT");
 
diff --git a/cool-core/src/test/java/com/nus/cool/functionality/CohortAnalysisTest.java b/cool-core/src/test/java/com/nus/cool/functionality/CohortAnalysisTest.java
index 73f824c1..bc30788a 100644
--- a/cool-core/src/test/java/com/nus/cool/functionality/CohortAnalysisTest.java
+++ b/cool-core/src/test/java/com/nus/cool/functionality/CohortAnalysisTest.java
@@ -5,7 +5,6 @@
 import com.nus.cool.core.cohort.ResultType;
 import com.nus.cool.core.cohort.storage.CohortRet;
 import com.nus.cool.core.util.ArrayUtil;
-
 import java.io.File;
 import java.io.IOException;
 import java.nio.file.Paths;