Enable maven-checkstyle-plugin in apex-pdp

Enable maven-checkstyle-plugin in apex-pdp/pom.xml to fail the build at warning level.
Fix all the existing check style issues in the component.

Change-Id: I4de9c1bd9ca5a2876de9086d2d3526cbdc25c080
Issue-ID: POLICY-1732
Signed-off-by: a.sreekumar <ajith.sreekumar@est.tech>

3 files changed, 10 insertions, 13 deletions

diff --git a/model/basic-model/src/main/java/org/onap/policy/apex/model/basicmodel/package-info.java b/model/basic-model/src/main/java/org/onap/policy/apex/model/basicmodel/package-info.java
index 23968c9aa..e540646d9 100644
--- a/model/basic-model/src/main/java/org/onap/policy/apex/model/basicmodel/package-info.java
+++ b/model/basic-model/src/main/java/org/onap/policy/apex/model/basicmodel/package-info.java
@@ -1,19 +1,20 @@
 /*
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ *  Modifications Copyright (C) 2019 Nordix Foundation.
  * ================================================================================
  * 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.
- * 
+ *
  * SPDX-License-Identifier: Apache-2.0
  * ============LICENSE_END=========================================================
  */
@@ -22,9 +23,9 @@
  * Provides the base definition of an APEX model. It also defines the Model Service, the mechanism that allows access to
  * the model for APEX concepts anywhere in the system.
  *
- * It also provides handling support to models, allowing them to be read and written to file and databases in JSON and
- * XML format.
- * 
+ * <p>It also provides handling support to models, allowing them to be read and written to file and databases in JSON
+ * and XML format.
+ *
  * @author Liam Fallon (liam.fallon@ericsson.com)
  */
 package org.onap.policy.apex.model.basicmodel;
diff --git a/model/context-model/src/main/java/org/onap/policy/apex/model/contextmodel/concepts/AxContextAlbum.java b/model/context-model/src/main/java/org/onap/policy/apex/model/contextmodel/concepts/AxContextAlbum.java
index e27bf78e8..7dddc4099 100644
--- a/model/context-model/src/main/java/org/onap/policy/apex/model/contextmodel/concepts/AxContextAlbum.java
+++ b/model/context-model/src/main/java/org/onap/policy/apex/model/contextmodel/concepts/AxContextAlbum.java
@@ -22,7 +22,6 @@
 package org.onap.policy.apex.model.contextmodel.concepts;
 
 import java.util.List;
-
 import javax.persistence.AttributeOverride;
 import javax.persistence.AttributeOverrides;
 import javax.persistence.Column;
@@ -35,7 +34,6 @@ import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlElement;
 import javax.xml.bind.annotation.XmlRootElement;
 import javax.xml.bind.annotation.XmlType;
-
 import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
 import org.onap.policy.apex.model.basicmodel.concepts.AxConcept;
 import org.onap.policy.apex.model.basicmodel.concepts.AxKey;
@@ -106,7 +104,7 @@ public class AxContextAlbum extends AxConcept {
     @AttributeOverrides({
         @AttributeOverride(name = "name", column = @Column(name = "itemSchemaName")),
         @AttributeOverride(name = "version", column = @Column(name = "itemSchemaVersion"))
-    })
+        })
     @Column(name = "itemSchema")
     @XmlElement(name = "itemSchema", required = true)
     private AxArtifactKey itemSchema;
diff --git a/model/context-model/src/main/java/org/onap/policy/apex/model/contextmodel/concepts/AxContextModel.java b/model/context-model/src/main/java/org/onap/policy/apex/model/contextmodel/concepts/AxContextModel.java
index b2139f893..17980ed65 100644
--- a/model/context-model/src/main/java/org/onap/policy/apex/model/contextmodel/concepts/AxContextModel.java
+++ b/model/context-model/src/main/java/org/onap/policy/apex/model/contextmodel/concepts/AxContextModel.java
@@ -22,7 +22,6 @@
 package org.onap.policy.apex.model.contextmodel.concepts;
 
 import java.util.List;
-
 import javax.persistence.CascadeType;
 import javax.persistence.Entity;
 import javax.persistence.JoinColumn;
@@ -34,7 +33,6 @@ import javax.xml.bind.annotation.XmlAccessorType;
 import javax.xml.bind.annotation.XmlElement;
 import javax.xml.bind.annotation.XmlRootElement;
 import javax.xml.bind.annotation.XmlType;
-
 import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
 import org.onap.policy.apex.model.basicmodel.concepts.AxConcept;
 import org.onap.policy.apex.model.basicmodel.concepts.AxKey;
@@ -69,7 +67,7 @@ public class AxContextModel extends AxModel {
     @JoinColumns({
         @JoinColumn(name = "schemasName", referencedColumnName = "name"),
         @JoinColumn(name = "schemasVersion", referencedColumnName = "version")
-    })
+        })
     @XmlElement(name = "schemas", required = true)
     private AxContextSchemas schemas;
 
@@ -77,7 +75,7 @@ public class AxContextModel extends AxModel {
     @JoinColumns({
         @JoinColumn(name = "albumsName", referencedColumnName = "name"),
         @JoinColumn(name = "albumsVersion", referencedColumnName = "version")
-    })
+        })
     @XmlElement(name = "albums", required = true)
     private AxContextAlbums albums;
     // @formatter:on