Address level 4-6 security issues

Remove commons-compress and chage version of dom4j

Also fix checkstyle in affected modules

Issue-ID: POLICY-1065
Change-Id: Id37e54a54997656674af37dfd924aec5f69e410a
Signed-off-by: liamfallon <liam.fallon@ericsson.com>

6 files changed, 95 insertions, 87 deletions

diff --git a/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/pom.xml b/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/pom.xml
index 7d3a5975a..877806ba3 100644
--- a/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/pom.xml
+++ b/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/pom.xml
@@ -35,6 +35,12 @@
             <groupId>org.apache.avro</groupId>
             <artifactId>avro</artifactId>
             <version>1.8.2</version>
+            <exclusions>
+                <exclusion>
+                    <groupId>org.apache.commons</groupId>
+                    <artifactId>commons-compress</artifactId>
+                </exclusion>
+            </exclusions>
         </dependency>
         <dependency>
             <groupId>org.onap.policy.apex-pdp.model</groupId>
diff --git a/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-eclipselink/src/test/java/org/onap/policy/apex/plugins/persistence/jpa/eclipselink/EclipselinkApexDaoTest.java b/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-eclipselink/src/test/java/org/onap/policy/apex/plugins/persistence/jpa/eclipselink/EclipselinkApexDaoTest.java
index 4a27bcfa7..21b58f878 100644
--- a/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-eclipselink/src/test/java/org/onap/policy/apex/plugins/persistence/jpa/eclipselink/EclipselinkApexDaoTest.java
+++ b/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-eclipselink/src/test/java/org/onap/policy/apex/plugins/persistence/jpa/eclipselink/EclipselinkApexDaoTest.java
@@ -40,7 +40,7 @@ import org.onap.policy.apex.model.basicmodel.concepts.AxReferenceKey;
 import org.onap.policy.apex.model.basicmodel.dao.DaoParameters;
 
 /**
- * Junit tests for class EclipselinkApexDao
+ * Junit tests for class EclipselinkApexDao.
  * 
  * @author Dinh Danh Le (dinh.danh.le@ericsson.com)
  *
@@ -48,19 +48,24 @@ import org.onap.policy.apex.model.basicmodel.dao.DaoParameters;
 
 public class EclipselinkApexDaoTest {
 
-    private static final List<AxArtifactKey> TEST_ARTIKEYS = Arrays.asList(new AxArtifactKey[] {
-            new AxArtifactKey("ABC", "0.0.1"), new AxArtifactKey("DEF", "0.1.1"), new AxArtifactKey("XYZ", "1.1.1")});
+    private static final List<AxArtifactKey> TEST_ARTIKEYS = Arrays.asList(new AxArtifactKey[]
+        { new AxArtifactKey("ABC", "0.0.1"), new AxArtifactKey("DEF", "0.1.1"), new AxArtifactKey("XYZ", "1.1.1") });
 
-    private final DaoParameters DaoParameters = new DaoParameters();
+    private final DaoParameters daoParameters = new DaoParameters();
 
     private EclipselinkApexDao eclipselinkApexDao = null;
 
+    /**
+     * Setup the tests.
+     * 
+     * @throws ApexException Exceptions from test setup
+     */
     @Before
     public void setup() throws ApexException {
-        DaoParameters.setPluginClass(EclipselinkApexDao.class.getCanonicalName());
-        DaoParameters.setPersistenceUnit("DAOTest");
+        daoParameters.setPluginClass(EclipselinkApexDao.class.getCanonicalName());
+        daoParameters.setPersistenceUnit("DAOTest");
         eclipselinkApexDao = new EclipselinkApexDao();
-        eclipselinkApexDao.init(DaoParameters);
+        eclipselinkApexDao.init(daoParameters);
     }
 
     @After
@@ -115,7 +120,6 @@ public class EclipselinkApexDaoTest {
         }
     }
 
-
     @Test
     public void test_getArtifactByReferenceKey() {
         final AxArtifactKey artifactKey = new AxArtifactKey("XXX", "0.0.1");
@@ -133,12 +137,11 @@ public class EclipselinkApexDaoTest {
         assertNull(eclipselinkApexDao.getArtifact(ReferenceKeyTestEntity.class, anotherReferenceKey));
 
         // assert return only one entity when finding an entity with correct key
-        final ReferenceKeyTestEntity retEntity =
-                eclipselinkApexDao.getArtifact(ReferenceKeyTestEntity.class, referenceKey);
+        final ReferenceKeyTestEntity retEntity = eclipselinkApexDao.getArtifact(ReferenceKeyTestEntity.class,
+                        referenceKey);
         assertEquals(referenceKey, retEntity.getKey());
     }
 
-
     @Test
     public void test_getArtifactByArtifactKey() {
         final AxArtifactKey artifactKey = new AxArtifactKey("XXX", "0.0.1");
@@ -152,12 +155,12 @@ public class EclipselinkApexDaoTest {
         assertNull(eclipselinkApexDao.getArtifact(ArtifactKeyTestEntity.class, otherArtifactKey));
 
         // assert return only one entity when finding an entity with correct key
-        final ArtifactKeyTestEntity retEntity = eclipselinkApexDao.getArtifact(ArtifactKeyTestEntity.class, artifactKey);
+        final ArtifactKeyTestEntity retEntity = eclipselinkApexDao.getArtifact(ArtifactKeyTestEntity.class,
+                        artifactKey);
         assertNotNull(retEntity);
         assertEquals(artifactKey, retEntity.getKey());
     }
 
-
     @Test
     public void test_deleteByArtifactKey() {
         // initialize a list of (3) entities corresponding to the list of testArtiKeys
@@ -177,7 +180,6 @@ public class EclipselinkApexDaoTest {
         assertEquals(100.0, remainingEntities.get(0).getDoubleValue(), 0.0);
     }
 
-
     @Test
     public void test_deleteByReferenceKey() {
         // prepare 2 AxArtifactKeys
@@ -185,9 +187,12 @@ public class EclipselinkApexDaoTest {
         final AxArtifactKey owner1Key = new AxArtifactKey("Owner1", "0.0.1");
 
         // prepare a list of (3) AxReferenceKeys corresponding to owner0Key
-        final List<AxReferenceKey> refKey0s =
-                Arrays.asList(new AxReferenceKey[] {new AxReferenceKey(owner0Key, "Entity01"),
-                        new AxReferenceKey(owner0Key, "Entity02"), new AxReferenceKey(owner0Key, "Entity03")});
+        final List<AxReferenceKey> refKey0s = Arrays.asList(new AxReferenceKey[] {
+            new AxReferenceKey(owner0Key, "Entity01"),
+            new AxReferenceKey(owner0Key, "Entity02"),
+            new AxReferenceKey(owner0Key, "Entity03")
+        });
+        
         // prepare 2 more AxReferenceKeys corresponding to owner1Key
         final AxReferenceKey refKey11 = new AxReferenceKey(owner1Key, "Entity11");
         final AxReferenceKey refKey12 = new AxReferenceKey(owner1Key, "Entity12");
@@ -218,7 +223,6 @@ public class EclipselinkApexDaoTest {
         assertEquals(0, eclipselinkApexDao.getAll(ReferenceKeyTestEntity.class).size());
     }
 
-
     @Test
     public void test_getAllByArtifactKey() {
 
@@ -228,7 +232,6 @@ public class EclipselinkApexDaoTest {
         final AxReferenceKey refKey0 = new AxReferenceKey(artiKey0, "Entity0");
         final AxReferenceKey refKey1 = new AxReferenceKey(artiKey1, "Entity1");
 
-
         // test with null class with known key --> return an empty list
         assertNotNull(eclipselinkApexDao.getAll(null, artiKey1));
         assertTrue(eclipselinkApexDao.getAll(null, artiKey1).equals(Collections.emptyList()));
@@ -246,6 +249,4 @@ public class EclipselinkApexDaoTest {
         assertEquals(200.0, retEntity.getDoubleValue(), 0);
     }
 
-
-
 }
diff --git a/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-hibernate/pom.xml b/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-hibernate/pom.xml
index b1102ffe6..1c675dc54 100644
--- a/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-hibernate/pom.xml
+++ b/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-hibernate/pom.xml
@@ -42,6 +42,11 @@
                 </exclusion>
             </exclusions>
         </dependency>
+                <dependency>
+                    <groupId>dom4j</groupId>
+                    <artifactId>dom4j</artifactId>
+                    <version>1.6</version>
+                </dependency>
         <dependency>
             <groupId>org.hibernate</groupId>
             <artifactId>hibernate-c3p0</artifactId>
diff --git a/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-hibernate/src/main/java/org/onap/policy/apex/plugins/persistence/jpa/hibernate/HibernateApexDao.java b/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-hibernate/src/main/java/org/onap/policy/apex/plugins/persistence/jpa/hibernate/HibernateApexDao.java
index 087535d6b..19ad01054 100644
--- a/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-hibernate/src/main/java/org/onap/policy/apex/plugins/persistence/jpa/hibernate/HibernateApexDao.java
+++ b/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-hibernate/src/main/java/org/onap/policy/apex/plugins/persistence/jpa/hibernate/HibernateApexDao.java
@@ -57,15 +57,15 @@ public class HibernateApexDao extends DefaultApexDao {
      * org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey)
      */
     @Override
-    public <T extends AxConcept> void delete(final Class<T> aClass, final AxArtifactKey key) {
+    public <T extends AxConcept> void delete(final Class<T> clazz, final AxArtifactKey key) {
         if (key == null) {
             return;
         }
         final EntityManager mg = getEntityManager();
         try {
             mg.getTransaction().begin();
-            mg.createQuery(DELETE_FROM + aClass.getSimpleName() + WHERE_KEY_NAME + key.getName() + AND_KEY_VERSION
-                    + key.getVersion() + "'").executeUpdate();
+            mg.createQuery(DELETE_FROM + clazz.getSimpleName() + WHERE_KEY_NAME + key.getName() + AND_KEY_VERSION
+                            + key.getVersion() + "'").executeUpdate();
             mg.getTransaction().commit();
         } finally {
             mg.close();
@@ -79,16 +79,16 @@ public class HibernateApexDao extends DefaultApexDao {
      * org.onap.policy.apex.model.basicmodel.concepts.AxReferenceKey)
      */
     @Override
-    public <T extends AxConcept> void delete(final Class<T> aClass, final AxReferenceKey key) {
+    public <T extends AxConcept> void delete(final Class<T> clazz, final AxReferenceKey key) {
         if (key == null) {
             return;
         }
         final EntityManager mg = getEntityManager();
         try {
             mg.getTransaction().begin();
-            mg.createQuery(DELETE_FROM + aClass.getSimpleName() + WHERE_KEY_PARENT_KEY_NAME + key.getParentKeyName()
-                    + AND_KEY_PARENT_KEY_VERSION + key.getParentKeyVersion() + AND_KEY_LOCAL_NAME + key.getLocalName()
-                    + "'").executeUpdate();
+            mg.createQuery(DELETE_FROM + clazz.getSimpleName() + WHERE_KEY_PARENT_KEY_NAME + key.getParentKeyName()
+                            + AND_KEY_PARENT_KEY_VERSION + key.getParentKeyVersion() + AND_KEY_LOCAL_NAME
+                            + key.getLocalName() + "'").executeUpdate();
             mg.getTransaction().commit();
         } finally {
             mg.close();
@@ -102,7 +102,7 @@ public class HibernateApexDao extends DefaultApexDao {
      * java.util.Collection)
      */
     @Override
-    public <T extends AxConcept> int deleteByArtifactKey(final Class<T> aClass, final Collection<AxArtifactKey> keys) {
+    public <T extends AxConcept> int deleteByArtifactKey(final Class<T> clazz, final Collection<AxArtifactKey> keys) {
         if (keys == null || keys.isEmpty()) {
             return 0;
         }
@@ -111,8 +111,8 @@ public class HibernateApexDao extends DefaultApexDao {
         try {
             mg.getTransaction().begin();
             for (final AxArtifactKey key : keys) {
-                deletedCount += mg.createQuery(DELETE_FROM + aClass.getSimpleName() + WHERE_KEY_NAME + key.getName()
-                        + AND_KEY_VERSION + key.getVersion() + "'").executeUpdate();
+                deletedCount += mg.createQuery(DELETE_FROM + clazz.getSimpleName() + WHERE_KEY_NAME + key.getName()
+                                + AND_KEY_VERSION + key.getVersion() + "'").executeUpdate();
             }
             mg.getTransaction().commit();
         } finally {
@@ -127,8 +127,7 @@ public class HibernateApexDao extends DefaultApexDao {
      * @see org.onap.policy.apex.core.model.dao.ApexDao#deleteByContextUsageKey(java.lang.Class, java.util.Collection)
      */
     @Override
-    public <T extends AxConcept> int deleteByReferenceKey(final Class<T> aClass,
-            final Collection<AxReferenceKey> keys) {
+    public <T extends AxConcept> int deleteByReferenceKey(final Class<T> clazz, final Collection<AxReferenceKey> keys) {
         if (keys == null || keys.isEmpty()) {
             return 0;
         }
@@ -137,9 +136,9 @@ public class HibernateApexDao extends DefaultApexDao {
         try {
             mg.getTransaction().begin();
             for (final AxReferenceKey key : keys) {
-                deletedCount += mg.createQuery(DELETE_FROM + aClass.getSimpleName() + WHERE_KEY_PARENT_KEY_NAME
-                        + key.getParentKeyName() + AND_KEY_PARENT_KEY_VERSION + key.getParentKeyVersion()
-                        + AND_KEY_LOCAL_NAME + key.getLocalName() + "'").executeUpdate();
+                deletedCount += mg.createQuery(DELETE_FROM + clazz.getSimpleName() + WHERE_KEY_PARENT_KEY_NAME
+                                + key.getParentKeyName() + AND_KEY_PARENT_KEY_VERSION + key.getParentKeyVersion()
+                                + AND_KEY_LOCAL_NAME + key.getLocalName() + "'").executeUpdate();
             }
             mg.getTransaction().commit();
         } finally {
@@ -154,11 +153,11 @@ public class HibernateApexDao extends DefaultApexDao {
      * @see org.onap.policy.apex.core.model.dao.ApexDao#deleteAll(java.lang.Class)
      */
     @Override
-    public <T extends AxConcept> void deleteAll(final Class<T> aClass) {
+    public <T extends AxConcept> void deleteAll(final Class<T> clazz) {
         final EntityManager mg = getEntityManager();
         try {
             mg.getTransaction().begin();
-            mg.createQuery(DELETE_FROM + aClass.getSimpleName()).executeUpdate();
+            mg.createQuery(DELETE_FROM + clazz.getSimpleName()).executeUpdate();
             mg.getTransaction().commit();
         } finally {
             mg.close();
@@ -171,21 +170,21 @@ public class HibernateApexDao extends DefaultApexDao {
      * @see org.onap.policy.apex.core.model.dao.ApexDao#getAll(java.lang.Class)
      */
     @Override
-    public <T extends AxConcept> List<T> getAll(final Class<T> aClass) {
-        if (aClass == null) {
+    public <T extends AxConcept> List<T> getAll(final Class<T> clazz) {
+        if (clazz == null) {
             return Collections.emptyList();
         }
         final EntityManager mg = getEntityManager();
         try {
-            final List<T> result = mg.createQuery(FROM + aClass.getSimpleName(), aClass).getResultList();
+            final List<T> result = mg.createQuery(FROM + clazz.getSimpleName(), clazz).getResultList();
             final List<T> cloneResult = new ArrayList<>();
             for (final T t : result) {
                 try {
-                    final T clonedT = aClass.newInstance();
+                    final T clonedT = clazz.newInstance();
                     t.copyTo(clonedT);
                     cloneResult.add(clonedT);
                 } catch (final Exception e) {
-                    LOGGER.warn("Could not clone object of class \"" + aClass.getCanonicalName() + "\"", e);
+                    LOGGER.warn("Could not clone object of class \"" + clazz.getCanonicalName() + "\"", e);
                     return cloneResult;
                 }
             }
@@ -202,14 +201,14 @@ public class HibernateApexDao extends DefaultApexDao {
      * org.onap.policy.apex.core.model.concepts.AxArtifactKey)
      */
     @Override
-    public <T extends AxConcept> List<T> getAll(final Class<T> aClass, final AxArtifactKey parentKey) {
-        if (aClass == null) {
+    public <T extends AxConcept> List<T> getAll(final Class<T> clazz, final AxArtifactKey parentKey) {
+        if (clazz == null) {
             return Collections.emptyList();
         }
         final EntityManager mg = getEntityManager();
         try {
-            return mg.createQuery(FROM + aClass.getSimpleName() + WHERE_KEY_PARENT_KEY_NAME + parentKey.getName()
-                    + AND_KEY_PARENT_KEY_VERSION + parentKey.getVersion() + "'", aClass).getResultList();
+            return mg.createQuery(FROM + clazz.getSimpleName() + WHERE_KEY_PARENT_KEY_NAME + parentKey.getName()
+                            + AND_KEY_PARENT_KEY_VERSION + parentKey.getVersion() + "'", clazz).getResultList();
         } finally {
             mg.close();
         }
@@ -222,15 +221,15 @@ public class HibernateApexDao extends DefaultApexDao {
      * org.onap.policy.apex.core.model.concepts.AxArtifactKey)
      */
     @Override
-    public <T extends AxConcept> T getArtifact(final Class<T> aClass, final AxArtifactKey key) {
-        if (aClass == null || key == null) {
+    public <T extends AxConcept> T getArtifact(final Class<T> clazz, final AxArtifactKey key) {
+        if (clazz == null || key == null) {
             return null;
         }
         final EntityManager mg = getEntityManager();
         List<T> ret;
         try {
-            ret = mg.createQuery(FROM + aClass.getSimpleName() + WHERE_KEY_NAME + key.getName() + AND_KEY_VERSION
-                    + key.getVersion() + "'", aClass).getResultList();
+            ret = mg.createQuery(FROM + clazz.getSimpleName() + WHERE_KEY_NAME + key.getName() + AND_KEY_VERSION
+                            + key.getVersion() + "'", clazz).getResultList();
         } finally {
             mg.close();
         }
@@ -238,8 +237,8 @@ public class HibernateApexDao extends DefaultApexDao {
             return null;
         }
         if (ret.size() > 1) {
-            throw new IllegalArgumentException("More than one result was returned for search for " + aClass
-                    + " with key " + key.getId() + ": " + ret);
+            throw new IllegalArgumentException("More than one result was returned for search for " + clazz
+                            + " with key " + key.getId() + ": " + ret);
         }
         return ret.get(0);
     }
@@ -251,16 +250,16 @@ public class HibernateApexDao extends DefaultApexDao {
      * org.onap.policy.apex.core.model.concepts.AxReferenceKey)
      */
     @Override
-    public <T extends AxConcept> T getArtifact(final Class<T> aClass, final AxReferenceKey key) {
-        if (aClass == null || key == null) {
+    public <T extends AxConcept> T getArtifact(final Class<T> clazz, final AxReferenceKey key) {
+        if (clazz == null || key == null) {
             return null;
         }
         final EntityManager mg = getEntityManager();
         List<T> ret;
         try {
-            ret = mg.createQuery(FROM + aClass.getSimpleName() + WHERE_KEY_PARENT_KEY_NAME + key.getParentKeyName()
-                    + AND_KEY_PARENT_KEY_VERSION + key.getParentKeyVersion() + AND_KEY_LOCAL_NAME + key.getLocalName()
-                    + "'", aClass).getResultList();
+            ret = mg.createQuery(FROM + clazz.getSimpleName() + WHERE_KEY_PARENT_KEY_NAME + key.getParentKeyName()
+                            + AND_KEY_PARENT_KEY_VERSION + key.getParentKeyVersion() + AND_KEY_LOCAL_NAME
+                            + key.getLocalName() + "'", clazz).getResultList();
         } finally {
             mg.close();
         }
@@ -268,8 +267,8 @@ public class HibernateApexDao extends DefaultApexDao {
             return null;
         }
         if (ret.size() > 1) {
-            throw new IllegalArgumentException("More than one result was returned for search for " + aClass
-                    + " with key " + key.getId() + ": " + ret);
+            throw new IllegalArgumentException("More than one result was returned for search for " + clazz
+                            + " with key " + key.getId() + ": " + ret);
         }
         return ret.get(0);
     }
diff --git a/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-hibernate/src/test/java/org/onap/policy/apex/plugins/persistence/jpa/hibernate/HibernateApexDaoTest.java b/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-hibernate/src/test/java/org/onap/policy/apex/plugins/persistence/jpa/hibernate/HibernateApexDaoTest.java
index 1f100fde8..e96c8ea49 100644
--- a/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-hibernate/src/test/java/org/onap/policy/apex/plugins/persistence/jpa/hibernate/HibernateApexDaoTest.java
+++ b/plugins/plugins-persistence/plugins-persistence-jpa/plugins-persistence-jpa-hibernate/src/test/java/org/onap/policy/apex/plugins/persistence/jpa/hibernate/HibernateApexDaoTest.java
@@ -40,31 +40,40 @@ import org.onap.policy.apex.model.basicmodel.concepts.AxReferenceKey;
 import org.onap.policy.apex.model.basicmodel.dao.DaoParameters;
 
 /**
- * Junit test for class HibernateApexDao
+ * Junit test for class HibernateApexDao.
  * 
  * @author Dinh Danh Le (dinh.danh.le@ericsson.com)
  *
  */
 
 public class HibernateApexDaoTest {
-
     private static final List<AxArtifactKey> TEST_ARTIKEYS = Arrays.asList(new AxArtifactKey[] {
-            new AxArtifactKey("ABC", "0.0.1"), new AxArtifactKey("DEF", "0.1.1"), new AxArtifactKey("XYZ", "1.1.1")});
+        new AxArtifactKey("ABC", "0.0.1"),
+        new AxArtifactKey("DEF", "0.1.1"), new AxArtifactKey("XYZ", "1.1.1")
+    });
 
-    private final DaoParameters DaoParameters = new DaoParameters();
+    private final DaoParameters daoParameters = new DaoParameters();
 
     private HibernateApexDao hibernateApexDao = null;
 
+    /**
+     * Set up tests.
+     * 
+     * @throws ApexException on test setup errors
+     */
     @Before
-    public void setupDAO() throws ApexException {
-        DaoParameters.setPluginClass(HibernateApexDao.class.getCanonicalName());
-        DaoParameters.setPersistenceUnit("DAOTest");
+    public void setupDao() throws ApexException {
+        daoParameters.setPluginClass(HibernateApexDao.class.getCanonicalName());
+        daoParameters.setPersistenceUnit("DAOTest");
         hibernateApexDao = new HibernateApexDao();
-        hibernateApexDao.init(DaoParameters);
+        hibernateApexDao.init(daoParameters);
     }
 
+    /**
+     * Cleardown tests.
+     */
     @After
-    public void teardownDAO() {
+    public void teardownDao() {
         hibernateApexDao.close();
     }
 
@@ -115,7 +124,6 @@ public class HibernateApexDaoTest {
         }
     }
 
-
     @Test
     public void test_getArtifactByReferenceKey() {
         final AxArtifactKey artifactKey = new AxArtifactKey("XXX", "0.0.1");
@@ -133,12 +141,11 @@ public class HibernateApexDaoTest {
         assertNull(hibernateApexDao.getArtifact(ReferenceKeyTestEntity.class, anotherReferenceKey));
 
         // assert return only one entity when finding an entity with correct key
-        final ReferenceKeyTestEntity retEntity =
-                hibernateApexDao.getArtifact(ReferenceKeyTestEntity.class, referenceKey);
+        final ReferenceKeyTestEntity retEntity = hibernateApexDao.getArtifact(ReferenceKeyTestEntity.class,
+                        referenceKey);
         assertEquals(referenceKey, retEntity.getKey());
     }
 
-
     @Test
     public void test_getArtifactByArtifactKey() {
         final AxArtifactKey artifactKey = new AxArtifactKey("XXX", "0.0.1");
@@ -157,7 +164,6 @@ public class HibernateApexDaoTest {
         assertEquals(artifactKey, retEntity.getKey());
     }
 
-
     @Test
     public void test_deleteByArtifactKey() {
         // initialize a list of (3) entities corresponding to the list of testArtiKeys
@@ -177,7 +183,6 @@ public class HibernateApexDaoTest {
         assertEquals(100.0, remainingEntities.get(0).getDoubleValue(), 0.0);
     }
 
-
     @Test
     public void test_deleteByReferenceKey() {
         // prepare 2 AxArtifactKeys
@@ -185,9 +190,10 @@ public class HibernateApexDaoTest {
         final AxArtifactKey owner1Key = new AxArtifactKey("Owner1", "0.0.1");
 
         // prepare a list of (3) AxReferenceKeys corresponding to owner0Key
-        final List<AxReferenceKey> refKey0s =
-                Arrays.asList(new AxReferenceKey[] {new AxReferenceKey(owner0Key, "Entity01"),
-                        new AxReferenceKey(owner0Key, "Entity02"), new AxReferenceKey(owner0Key, "Entity03")});
+        final List<AxReferenceKey> refKey0s = Arrays.asList(new AxReferenceKey[] {
+            new AxReferenceKey(owner0Key, "Entity01"), new AxReferenceKey(owner0Key, "Entity02"),
+            new AxReferenceKey(owner0Key, "Entity03")
+        });
         // prepare 2 more AxReferenceKeys corresponding to owner1Key
         final AxReferenceKey refKey11 = new AxReferenceKey(owner1Key, "Entity11");
         final AxReferenceKey refKey12 = new AxReferenceKey(owner1Key, "Entity12");
@@ -218,7 +224,6 @@ public class HibernateApexDaoTest {
         assertEquals(0, hibernateApexDao.getAll(ReferenceKeyTestEntity.class).size());
     }
 
-
     @Test
     public void test_getAllByArtifactKey() {
 
@@ -228,7 +233,6 @@ public class HibernateApexDaoTest {
         final AxReferenceKey refKey0 = new AxReferenceKey(artiKey0, "Entity0");
         final AxReferenceKey refKey1 = new AxReferenceKey(artiKey1, "Entity1");
 
-
         // test with null class with known key --> return an empty list
         assertNotNull(hibernateApexDao.getAll(null, artiKey1));
         assertTrue(hibernateApexDao.getAll(null, artiKey1).equals(Collections.emptyList()));
@@ -246,6 +250,4 @@ public class HibernateApexDaoTest {
         assertEquals(200.0, retEntity.getDoubleValue(), 0);
     }
 
-
-
 }
diff --git a/plugins/plugins-persistence/plugins-persistence-jpa/pom.xml b/plugins/plugins-persistence/plugins-persistence-jpa/pom.xml
index a517dd658..1ceb9b436 100644
--- a/plugins/plugins-persistence/plugins-persistence-jpa/pom.xml
+++ b/plugins/plugins-persistence/plugins-persistence-jpa/pom.xml
@@ -49,11 +49,6 @@
             <artifactId>h2</artifactId>
             <scope>test</scope>
         </dependency>
-        <dependency>
-            <groupId>dom4j</groupId>
-            <artifactId>dom4j</artifactId>
-            <version>${version.dom4j}</version>
-        </dependency>
     </dependencies>
 
     <modules>