diff --git a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/clean/GroupEntitiesAndRelationsSparkJob.java b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/clean/GroupEntitiesAndRelationsSparkJob.java
index e2ff90d7b..3186f828c 100644
--- a/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/clean/GroupEntitiesAndRelationsSparkJob.java
+++ b/dhp-workflows/dhp-graph-mapper/src/main/java/eu/dnetlib/dhp/oa/graph/clean/GroupEntitiesAndRelationsSparkJob.java
@@ -10,7 +10,6 @@ import java.util.Objects;
 import java.util.Optional;
 import java.util.stream.Collectors;
 
-import com.fasterxml.jackson.databind.DeserializationFeature;
 import org.apache.commons.io.IOUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.spark.SparkConf;
@@ -22,6 +21,7 @@ import org.apache.spark.sql.expressions.Aggregator;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import com.fasterxml.jackson.databind.DeserializationFeature;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.jayway.jsonpath.Configuration;
 import com.jayway.jsonpath.DocumentContext;
@@ -46,7 +46,7 @@ public class GroupEntitiesAndRelationsSparkJob {
 	private final static String SOURCE_JPATH = "$.source";
 
 	private static final ObjectMapper OBJECT_MAPPER = new ObjectMapper()
-			.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
+		.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
 
 	public static void main(String[] args) throws Exception {