diff --git a/dhp-common/src/main/java/eu/dnetlib/dhp/oa/merge/AuthorMerger.java b/dhp-common/src/main/java/eu/dnetlib/dhp/oa/merge/AuthorMerger.java
index 5ad4598a6..b3d84c40f 100644
--- a/dhp-common/src/main/java/eu/dnetlib/dhp/oa/merge/AuthorMerger.java
+++ b/dhp-common/src/main/java/eu/dnetlib/dhp/oa/merge/AuthorMerger.java
@@ -73,7 +73,7 @@ public class AuthorMerger {
 		if (base == null || enrich == null)
 			return;
 
-		//<pidComparableString, Author> (if an Author has more than 1 pid, it appears 2 times in the list)
+		// <pidComparableString, Author> (if an Author has more than 1 pid, it appears 2 times in the list)
 		final Map<String, Author> basePidAuthorMap = base
 			.stream()
 			.filter(a -> a.getPid() != null && a.getPid().size() > 0)
@@ -84,7 +84,7 @@ public class AuthorMerger {
 					.map(p -> new Tuple2<>(pidToComparableString(p), a)))
 			.collect(Collectors.toMap(Tuple2::_1, Tuple2::_2, (x1, x2) -> x1));
 
-		//<pid, Author> (list of pid that are missing in the other list)
+		// <pid, Author> (list of pid that are missing in the other list)
 		final List<Tuple2<StructuredProperty, Author>> pidToEnrich = enrich
 			.stream()
 			.filter(a -> a.getPid() != null && a.getPid().size() > 0)
@@ -96,7 +96,6 @@ public class AuthorMerger {
 					.map(p -> new Tuple2<>(p, a)))
 			.collect(Collectors.toList());
 
-
 		pidToEnrich
 			.forEach(
 				a -> {
diff --git a/dhp-common/src/test/java/eu/dnetlib/dhp/oa/merge/AuthorMergerTest.java b/dhp-common/src/test/java/eu/dnetlib/dhp/oa/merge/AuthorMergerTest.java
index 1ff9753be..02e694770 100644
--- a/dhp-common/src/test/java/eu/dnetlib/dhp/oa/merge/AuthorMergerTest.java
+++ b/dhp-common/src/test/java/eu/dnetlib/dhp/oa/merge/AuthorMergerTest.java
@@ -1,14 +1,5 @@
-package eu.dnetlib.dhp.oa.merge;
 
-import eu.dnetlib.dhp.schema.oaf.Author;
-import eu.dnetlib.dhp.schema.oaf.Publication;
-import eu.dnetlib.dhp.schema.oaf.StructuredProperty;
-import eu.dnetlib.pace.util.MapDocumentUtil;
-import org.codehaus.jackson.map.ObjectMapper;
-import org.junit.jupiter.api.Assertions;
-import org.junit.jupiter.api.BeforeEach;
-import org.junit.jupiter.api.Test;
-import scala.Tuple2;
+package eu.dnetlib.dhp.oa.merge;
 
 import java.io.BufferedReader;
 import java.io.FileReader;
@@ -18,80 +9,91 @@ import java.util.ArrayList;
 import java.util.List;
 import java.util.stream.Collectors;
 
+import org.codehaus.jackson.map.ObjectMapper;
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import eu.dnetlib.dhp.schema.oaf.Author;
+import eu.dnetlib.dhp.schema.oaf.Publication;
+import eu.dnetlib.dhp.schema.oaf.StructuredProperty;
+import eu.dnetlib.pace.util.MapDocumentUtil;
+import scala.Tuple2;
+
 public class AuthorMergerTest {
 
-    String publicationsBasePath;
+	String publicationsBasePath;
 
-    List<List<Author>> authors;
+	List<List<Author>> authors;
 
-    @BeforeEach
-    public void setUp() throws Exception {
+	@BeforeEach
+	public void setUp() throws Exception {
 
-        publicationsBasePath = Paths
-                .get(AuthorMergerTest.class.getResource("/eu/dnetlib/dhp/oa/merge").toURI())
-                .toFile()
-                .getAbsolutePath();
+		publicationsBasePath = Paths
+			.get(AuthorMergerTest.class.getResource("/eu/dnetlib/dhp/oa/merge").toURI())
+			.toFile()
+			.getAbsolutePath();
 
-        authors =
-                readSample(publicationsBasePath + "/publications_with_authors.json", Publication.class)
-                .stream()
-                .map(p -> p._2().getAuthor()).collect(Collectors.toList());
+		authors = readSample(publicationsBasePath + "/publications_with_authors.json", Publication.class)
+			.stream()
+			.map(p -> p._2().getAuthor())
+			.collect(Collectors.toList());
 
-    }
+	}
 
-    @Test
-    public void mergeTest() { //used in the dedup: threshold set to 0.95
+	@Test
+	public void mergeTest() { // used in the dedup: threshold set to 0.95
 
-        for (List<Author> authors1: authors){
-            System.out.println("List " + (authors.indexOf(authors1)+1));
-            for (Author author: authors1){
-                System.out.println(authorToString(author));
-            }
-        }
+		for (List<Author> authors1 : authors) {
+			System.out.println("List " + (authors.indexOf(authors1) + 1));
+			for (Author author : authors1) {
+				System.out.println(authorToString(author));
+			}
+		}
 
-        List<Author> merge = AuthorMerger.merge(authors);
+		List<Author> merge = AuthorMerger.merge(authors);
 
-        System.out.println("Merge ");
-        for (Author author: merge) {
-            System.out.println(authorToString(author));
-        }
+		System.out.println("Merge ");
+		for (Author author : merge) {
+			System.out.println(authorToString(author));
+		}
 
-        Assertions.assertEquals(7, merge.size());
+		Assertions.assertEquals(7, merge.size());
 
-    }
+	}
 
-    public <T> List<Tuple2<String, T>> readSample(String path, Class<T> clazz) {
-        List<Tuple2<String, T>> res = new ArrayList<>();
-        BufferedReader reader;
-        try {
-            reader = new BufferedReader(new FileReader(path));
-            String line = reader.readLine();
-            while (line != null) {
-                res
-                        .add(
-                                new Tuple2<>(
-                                        MapDocumentUtil.getJPathString("$.id", line),
-                                        new ObjectMapper().readValue(line, clazz)));
-                // read next line
-                line = reader.readLine();
-            }
-            reader.close();
-        } catch (IOException e) {
-            e.printStackTrace();
-        }
+	public <T> List<Tuple2<String, T>> readSample(String path, Class<T> clazz) {
+		List<Tuple2<String, T>> res = new ArrayList<>();
+		BufferedReader reader;
+		try {
+			reader = new BufferedReader(new FileReader(path));
+			String line = reader.readLine();
+			while (line != null) {
+				res
+					.add(
+						new Tuple2<>(
+							MapDocumentUtil.getJPathString("$.id", line),
+							new ObjectMapper().readValue(line, clazz)));
+				// read next line
+				line = reader.readLine();
+			}
+			reader.close();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
 
-        return res;
-    }
+		return res;
+	}
 
-    public String authorToString(Author a){
+	public String authorToString(Author a) {
 
-        String print = "Fullname = ";
-        print += a.getFullname() + " pid = [";
-        if (a.getPid() != null)
-            for (StructuredProperty sp : a.getPid()) {
-                print += sp.toComparableString() + " ";
-            }
-        print += "]";
-        return print;
-    }
+		String print = "Fullname = ";
+		print += a.getFullname() + " pid = [";
+		if (a.getPid() != null)
+			for (StructuredProperty sp : a.getPid()) {
+				print += sp.toComparableString() + " ";
+			}
+		print += "]";
+		return print;
+	}
 }