diff --git a/dhp-build/dhp-build-properties-maven-plugin/src/test/java/eu/dnetlib/maven/plugin/properties/WritePredefinedProjectPropertiesTest.java b/dhp-build/dhp-build-properties-maven-plugin/src/test/java/eu/dnetlib/maven/plugin/properties/WritePredefinedProjectPropertiesTest.java
index 19e9377af..eddcd8867 100644
--- a/dhp-build/dhp-build-properties-maven-plugin/src/test/java/eu/dnetlib/maven/plugin/properties/WritePredefinedProjectPropertiesTest.java
+++ b/dhp-build/dhp-build-properties-maven-plugin/src/test/java/eu/dnetlib/maven/plugin/properties/WritePredefinedProjectPropertiesTest.java
@@ -88,7 +88,7 @@ class WritePredefinedProjectPropertiesTest {
 				.assertTrue(
 					MojoExecutionException.class.isAssignableFrom(e.getClass()) ||
 						IllegalArgumentException.class.isAssignableFrom(e.getClass()));
-        }
+		}
 	}
 
 	@Test
diff --git a/dhp-pace-core/src/main/java/eu/dnetlib/pace/util/DiffPatchMatch.java b/dhp-pace-core/src/main/java/eu/dnetlib/pace/util/DiffPatchMatch.java
index 84d49bd5c..12c96500e 100644
--- a/dhp-pace-core/src/main/java/eu/dnetlib/pace/util/DiffPatchMatch.java
+++ b/dhp-pace-core/src/main/java/eu/dnetlib/pace/util/DiffPatchMatch.java
@@ -1,6 +1,24 @@
 
 package eu.dnetlib.pace.util;
 
+/*
+ * Diff Match and Patch
+ * Copyright 2018 The diff-match-patch Authors.
+ * https://github.com/google/diff-match-patch
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
 /*
  * Diff Match and Patch
  * Copyright 2018 The diff-match-patch Authors.
diff --git a/dhp-workflows/dhp-dedup-openaire/src/main/java/eu/dnetlib/dhp/oa/dedup/graph/ConnectedComponent.java b/dhp-workflows/dhp-dedup-openaire/src/main/java/eu/dnetlib/dhp/oa/dedup/graph/ConnectedComponent.java
index 4fc0a25e8..f4b3c441a 100644
--- a/dhp-workflows/dhp-dedup-openaire/src/main/java/eu/dnetlib/dhp/oa/dedup/graph/ConnectedComponent.java
+++ b/dhp-workflows/dhp-dedup-openaire/src/main/java/eu/dnetlib/dhp/oa/dedup/graph/ConnectedComponent.java
@@ -93,7 +93,7 @@ public class ConnectedComponent implements Serializable {
 	}
 
 	public void setIds(List<String> ids) {
-		this.ids =ids;
+		this.ids = ids;
 	}
 
 	public String getCcId() {