fix sonar alert

- fix some sonar alerts

Change-Id: I98f28b343f0e7fcac685e7aa92d198df500deb80
Issue-ID: EXTAPI-107
Signed-off-by: romaingimbert <romain.gimbert@orange.com>

20 files changed, 91 insertions, 110 deletions

diff --git a/src/main/java/org/onap/nbi/apis/servicecatalog/SdcClient.java b/src/main/java/org/onap/nbi/apis/servicecatalog/SdcClient.java
index 109edbe..a4b8feb 100644
--- a/src/main/java/org/onap/nbi/apis/servicecatalog/SdcClient.java
+++ b/src/main/java/org/onap/nbi/apis/servicecatalog/SdcClient.java
@@ -20,6 +20,7 @@ import java.net.URI;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Map.Entry;
 import org.apache.commons.io.IOUtils;
 import org.onap.nbi.OnapComponentsUrlPaths;
 import org.onap.nbi.exceptions.BackendFunctionalException;
@@ -44,7 +45,6 @@ import org.springframework.web.util.UriComponentsBuilder;
 @Service
 public class SdcClient {
 
-    public static final String HTTP_CALL_SDC_ON = "HTTP call SDC on ";
     @Autowired
     private RestTemplate restTemplate;
 
@@ -79,9 +79,9 @@ public class SdcClient {
         UriComponentsBuilder callURI = UriComponentsBuilder.fromHttpUrl(sdcHost + OnapComponentsUrlPaths.SDC_ROOT_URL);
         if (parametersMap != null) {
             Map<String, String> stringStringMap = parametersMap.toSingleValueMap();
-            for (String key : stringStringMap.keySet()) {
-                if (!key.equals("fields")) {
-                    callURI.queryParam(key, stringStringMap.get(key));
+            for (Entry<String, String> entry : stringStringMap.entrySet()) {
+                if (!entry.getKey().equals("fields")) {
+                    callURI.queryParam(entry.getKey(), entry.getValue());
                 }
             }
         }
@@ -118,17 +118,17 @@ public class SdcClient {
         HttpHeaders httpHeaders = new HttpHeaders();
         httpHeaders.add(HEADER_ECOMP_INSTANCE_ID, ecompInstanceId);
         httpHeaders.add(HEADER_AUTHORIZATION, sdcHeaderAuthorization);
-        HttpEntity<String> entity = new HttpEntity<>("parameters", httpHeaders);
-
-        return entity;
+        return new HttpEntity<>("parameters", httpHeaders);
     }
 
 
     private ResponseEntity<Object> callSdc(URI callURI) {
         ResponseEntity<Object> response =
                 restTemplate.exchange(callURI, HttpMethod.GET, buildRequestHeader(), Object.class);
-        LOGGER.debug("response body : " + response.getBody().toString());
-        LOGGER.info("response status : " + response.getStatusCodeValue());
+        if(LOGGER.isDebugEnabled()) {
+            LOGGER.debug("response body : {} ",response.getBody().toString());
+        }
+        LOGGER.info("response status : {}", response.getStatusCodeValue());
         loggDebugIfResponseKo(callURI.toString(), response);
         return response;
     }
@@ -139,22 +139,21 @@ public class SdcClient {
             ResponseEntity<byte[]> response =
                     restTemplate.exchange(callURI, HttpMethod.GET, buildRequestHeader(), byte[].class);
             LOGGER.info("response status : " + response.getStatusCodeValue());
-            if (!response.getStatusCode().equals(HttpStatus.OK)) {
-                LOGGER.warn(HTTP_CALL_SDC_ON + callURI.toString() + " returns " + response.getStatusCodeValue() + ", ");
+            if (LOGGER.isWarnEnabled() && !response.getStatusCode().equals(HttpStatus.OK)) {
+                LOGGER.warn("HTTP call SDC on {} returns {} ", callURI.toString() , response.getStatusCodeValue());
             }
             return response;
 
         } catch (BackendFunctionalException e) {
-            LOGGER.error(HTTP_CALL_SDC_ON + callURI.toString() + " error " + e);
+            LOGGER.error("HTTP call SDC on {} error : {}", callURI.toString() , e);
             return null;
         }
     }
 
 
     private void loggDebugIfResponseKo(String callURI, ResponseEntity<Object> response) {
-        if (!response.getStatusCode().equals(HttpStatus.OK)) {
-            LOGGER.warn(HTTP_CALL_SDC_ON + callURI + " returns " + response.getStatusCodeValue() + ", "
-                + response.getBody().toString());
+        if (LOGGER.isWarnEnabled() && !response.getStatusCode().equals(HttpStatus.OK)) {
+            LOGGER.warn("HTTP call SDC on {} returns {} , {}", callURI , response.getStatusCodeValue() , response.getBody().toString());
         }
     }
 }
diff --git a/src/main/java/org/onap/nbi/apis/servicecatalog/ServiceSpecificationResource.java b/src/main/java/org/onap/nbi/apis/servicecatalog/ServiceSpecificationResource.java
index 262871a..e8ef9e3 100644
--- a/src/main/java/org/onap/nbi/apis/servicecatalog/ServiceSpecificationResource.java
+++ b/src/main/java/org/onap/nbi/apis/servicecatalog/ServiceSpecificationResource.java
@@ -19,7 +19,6 @@ import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
 import org.onap.nbi.commons.JsonRepresentation;
-import org.onap.nbi.commons.Resource;
 import org.onap.nbi.commons.ResourceManagement;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.MediaType;
@@ -33,7 +32,7 @@ import org.springframework.web.bind.annotation.RestController;
 
 @RestController
 @RequestMapping("/serviceSpecification")
-public class ServiceSpecificationResource extends ResourceManagement<Resource> {
+public class ServiceSpecificationResource extends ResourceManagement {
 
 
     @Autowired
diff --git a/src/main/java/org/onap/nbi/apis/servicecatalog/ToscaInfosProcessor.java b/src/main/java/org/onap/nbi/apis/servicecatalog/ToscaInfosProcessor.java
index b76e697..6b70a18 100644
--- a/src/main/java/org/onap/nbi/apis/servicecatalog/ToscaInfosProcessor.java
+++ b/src/main/java/org/onap/nbi/apis/servicecatalog/ToscaInfosProcessor.java
@@ -106,8 +106,8 @@ public class ToscaInfosProcessor {
     }
 
     private void buildCharacteristicValuesFormShema(String parameterType,
-            List<LinkedHashMap> serviceSpecCharacteristicValues, Object aDefault, ArrayList entry_schema) {
-        LinkedHashMap constraints = (LinkedHashMap) entry_schema.get(0);
+            List<LinkedHashMap> serviceSpecCharacteristicValues, Object aDefault, ArrayList entrySchema) {
+        LinkedHashMap constraints = (LinkedHashMap) entrySchema.get(0);
         if (constraints != null) {
             ArrayList constraintsList = (ArrayList) constraints.get("constraints");
             if (CollectionUtils.isNotEmpty(constraintsList)) {
@@ -129,9 +129,9 @@ public class ToscaInfosProcessor {
     }
 
 
-    private LinkedHashMap getToscaInfosFromResourceUUID(LinkedHashMap node_templates, String name) {
-        if(node_templates!=null) {
-            for (Object nodeTemplateObject : node_templates.values()) {
+    private LinkedHashMap getToscaInfosFromResourceUUID(LinkedHashMap nodeTemplates, String name) {
+        if(nodeTemplates!=null) {
+            for (Object nodeTemplateObject : nodeTemplates.values()) {
                 LinkedHashMap nodeTemplate = (LinkedHashMap) nodeTemplateObject;
                 LinkedHashMap metadata = (LinkedHashMap) nodeTemplate.get("metadata");
                 if(metadata.get("UUID")!=null && metadata.get("type")!=null) {
@@ -265,14 +265,10 @@ public class ToscaInfosProcessor {
                         while ((len = zis.read(buffer)) > 0) {
                             fos.write(buffer, 0, len);
                         }
-
-                        fos.close();
                     }
                     ze = zis.getNextEntry();
                 }
-
                 zis.closeEntry();
-                zis.close();
             }
 
             LOGGER.debug("Done");
diff --git a/src/main/java/org/onap/nbi/apis/serviceinventory/BaseClient.java b/src/main/java/org/onap/nbi/apis/serviceinventory/BaseClient.java
index c973f32..4c9d8e5 100644
--- a/src/main/java/org/onap/nbi/apis/serviceinventory/BaseClient.java
+++ b/src/main/java/org/onap/nbi/apis/serviceinventory/BaseClient.java
@@ -36,11 +36,12 @@ public abstract class BaseClient {
 
         ResponseEntity<Object> response = restTemplate.exchange(callURL, HttpMethod.GET,
                 new HttpEntity<>("parameters", httpHeaders), Object.class);
-        LOGGER.debug("response body : " + response.getBody().toString());
-        LOGGER.info("response status : " + response.getStatusCodeValue());
-        if (!response.getStatusCode().equals(HttpStatus.OK)) {
-            LOGGER.warn("HTTP call on " + callURL + " returns " + response.getStatusCodeValue() + ", "
-                    + response.getBody().toString());
+        if(LOGGER.isDebugEnabled()){
+            LOGGER.debug("response body : {}",response.getBody().toString());
+        }
+        LOGGER.info("response status : {}", response.getStatusCodeValue());
+        if (LOGGER.isWarnEnabled() && !response.getStatusCode().equals(HttpStatus.OK)) {
+            LOGGER.warn("HTTP call on {} returns {}, {}", callURL , response.getStatusCodeValue() ,response.getBody().toString());
         }
         return response;
     }
diff --git a/src/main/java/org/onap/nbi/apis/serviceorder/MultiClient.java b/src/main/java/org/onap/nbi/apis/serviceorder/MultiClient.java
index a7e3356..5e4668a 100644
--- a/src/main/java/org/onap/nbi/apis/serviceorder/MultiClient.java
+++ b/src/main/java/org/onap/nbi/apis/serviceorder/MultiClient.java
@@ -20,6 +20,7 @@ import java.util.HashMap;
 import java.util.LinkedHashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Map.Entry;
 import org.onap.nbi.OnapComponentsUrlPaths;
 import org.onap.nbi.apis.serviceorder.model.consumer.SubscriberInfo;
 import org.onap.nbi.exceptions.BackendFunctionalException;
@@ -75,8 +76,7 @@ public class MultiClient {
 
     public ResponseEntity<Object> getServiceCatalog(String id) {
         StringBuilder callURL = new StringBuilder().append(serviceCatalogUrl.getServiceCatalogUrl()).append(id);
-        ResponseEntity<Object> response = callApiGet(callURL.toString(), new HttpHeaders(), null);
-        return response;
+       return callApiGet(callURL.toString(), new HttpHeaders(), null);
     }
 
     public boolean doesServiceExistInServiceInventory(String id, String serviceName, String globalSubscriberId) {
@@ -86,10 +86,7 @@ public class MultiClient {
         param.put("relatedParty.id", globalSubscriberId);
 
         ResponseEntity<Object> response = callApiGet(callURL.toString(), new HttpHeaders(), param);
-        if (response == null || !response.getStatusCode().equals(HttpStatus.OK)) {
-            return false;
-        }
-        return true;
+       return response != null && response.getStatusCode().equals(HttpStatus.OK);
     }
 
 
@@ -125,10 +122,7 @@ public class MultiClient {
         StringBuilder callURL = new StringBuilder().append(aaiHost).append(OnapComponentsUrlPaths.AAI_GET_CUSTOMER_PATH)
                 .append(customerId);
         ResponseEntity<Object> response = callApiGet(callURL.toString(), buildRequestHeaderForAAI(), null);
-        if (response != null && response.getStatusCode().equals(HttpStatus.OK)) {
-            return true;
-        }
-        return false;
+        return(response != null && response.getStatusCode().equals(HttpStatus.OK));
     }
 
 
@@ -141,10 +135,7 @@ public class MultiClient {
                 aaiHost + OnapComponentsUrlPaths.AAI_GET_CUSTOMER_PATH + subscriberInfo.getGlobalSubscriberId();
 
         ResponseEntity<Object> response = putRequest(param, callURL, buildRequestHeaderForAAI());
-        if (response != null && response.getStatusCode().equals(HttpStatus.CREATED)) {
-            return true;
-        }
-        return false;
+        return response != null && response.getStatusCode().equals(HttpStatus.CREATED);
     }
 
 
@@ -166,10 +157,7 @@ public class MultiClient {
         String callURL = aaiHost + OnapComponentsUrlPaths.AAI_PUT_SERVICE_FOR_CUSTOMER_PATH + serviceName;
         String callUrlFormated = callURL.replace("$customerId", globalSubscriberId);
         ResponseEntity<Object> response =  putRequest(param, callUrlFormated, buildRequestHeaderForAAI());
-        if (response != null && response.getStatusCode().equals(HttpStatus.CREATED)) {
-            return true;
-        }
-        return false;
+        return response != null && response.getStatusCode().equals(HttpStatus.CREATED);
     }
 
 
@@ -178,9 +166,8 @@ public class MultiClient {
             ResponseEntity<Object> response =
                     restTemplate.exchange(callUrl, HttpMethod.PUT, new HttpEntity<>(param, httpHeaders), Object.class);
             LOGGER.info("response status : " + response.getStatusCodeValue());
-            if (!response.getStatusCode().equals(HttpStatus.CREATED)) {
-                LOGGER.warn("HTTP call on " + callUrl + " returns " + response.getStatusCodeValue() + ", "
-                        + response.getBody().toString());
+            if (LOGGER.isWarnEnabled() && !response.getStatusCode().equals(HttpStatus.CREATED)) {
+                LOGGER.warn("HTTP call on {} returns {} , {}", callUrl , response.getStatusCodeValue(), response.getBody().toString());
             }
             return response;
         } catch (BackendFunctionalException|ResourceAccessException e) {
@@ -196,8 +183,9 @@ public class MultiClient {
 
             UriComponentsBuilder builder = UriComponentsBuilder.fromUriString(callURL);
             if (param != null) {
-                for (String paramName : param.keySet()) {
-                    builder.queryParam(paramName, param.get(paramName));
+                for (Entry<String, String> stringEntry : param.entrySet()) {
+                    builder.queryParam(stringEntry.getKey(), stringEntry.getValue());
+
                 }
             }
             URI uri = builder.build().encode().toUri();
@@ -205,11 +193,13 @@ public class MultiClient {
 
             ResponseEntity<Object> response =
                     restTemplate.exchange(uri, HttpMethod.GET, new HttpEntity<>(httpHeaders), Object.class);
-            LOGGER.debug("response body : " + response.getBody().toString());
-            LOGGER.info("response status : " + response.getStatusCodeValue());
-            if (!response.getStatusCode().equals(HttpStatus.OK)) {
-                LOGGER.warn("HTTP call on " + callURL + " returns " + response.getStatusCodeValue() + ", "
-                        + response.getBody().toString());
+            if(LOGGER.isDebugEnabled()){
+                LOGGER.debug("response body : {}", response.getBody().toString());
+            }
+            LOGGER.info("response status : {}", response.getStatusCodeValue());
+            if (LOGGER.isWarnEnabled() && !response.getStatusCode().equals(HttpStatus.OK)) {
+                LOGGER.warn("HTTP call on {} returns {} , {}", callURL , response.getStatusCodeValue(), response.getBody().toString());
+
             }
             return response;
 
diff --git a/src/main/java/org/onap/nbi/apis/serviceorder/ServiceOrderResource.java b/src/main/java/org/onap/nbi/apis/serviceorder/ServiceOrderResource.java
index 12ee889..ca01af9 100644
--- a/src/main/java/org/onap/nbi/apis/serviceorder/ServiceOrderResource.java
+++ b/src/main/java/org/onap/nbi/apis/serviceorder/ServiceOrderResource.java
@@ -50,7 +50,7 @@ import org.springframework.web.bind.annotation.RestController;
 @RestController
 @RequestMapping("/serviceOrder")
 @EnableScheduling
-public class ServiceOrderResource extends ResourceManagement<ServiceOrder> {
+public class ServiceOrderResource extends ResourceManagement {
 
 
 
diff --git a/src/main/java/org/onap/nbi/apis/serviceorder/SoClient.java b/src/main/java/org/onap/nbi/apis/serviceorder/SoClient.java
index 3dba422..e2b10ab 100644
--- a/src/main/java/org/onap/nbi/apis/serviceorder/SoClient.java
+++ b/src/main/java/org/onap/nbi/apis/serviceorder/SoClient.java
@@ -37,7 +37,6 @@ import org.springframework.web.client.RestTemplate;
 public class SoClient {
 
     public static final String RESPONSE_STATUS = "response status : ";
-    public static final String RESPONSE_BODY = "response body : ";
     public static final String RETURNS = " returns ";
     public static final String ERROR_ON_CALLING = "error on calling ";
     @Autowired
@@ -104,11 +103,12 @@ public class SoClient {
 
     private void logResponsePost(String url, ResponseEntity<CreateServiceInstanceResponse> response) {
         LOGGER.info(RESPONSE_STATUS + response.getStatusCodeValue());
-        LOGGER.debug(RESPONSE_BODY + response.getBody().toString());
+        if(LOGGER.isDebugEnabled()){
+            LOGGER.debug("response body : {}", response.getBody().toString());
+        }
 
-        if (!response.getStatusCode().equals(HttpStatus.CREATED)) {
-            LOGGER.warn("HTTP call SO on " + url + RETURNS + response.getStatusCodeValue() + ", "
-                    + response.getBody().toString());
+        if (LOGGER.isWarnEnabled() && !response.getStatusCode().equals(HttpStatus.CREATED)) {
+            LOGGER.warn("HTTP call SO on {} returns {} , {}",url ,response.getStatusCodeValue(), response.getBody().toString());
         }
     }
 
@@ -131,11 +131,12 @@ public class SoClient {
 
     private void logResponseGet(String url, ResponseEntity<GetRequestStatusResponse> response) {
         if(response!=null){
-            LOGGER.debug(RESPONSE_BODY + response.getBody().toString());
-            LOGGER.info(RESPONSE_STATUS + response.getStatusCodeValue());
-            if (!response.getStatusCode().equals(HttpStatus.OK)) {
-                LOGGER.warn("HTTP call on " + url + RETURNS + response.getStatusCodeValue() + ", "
-                    + response.getBody().toString());
+            if(LOGGER.isDebugEnabled()){
+                LOGGER.debug("response body : {}", response.getBody().toString());
+            }
+            LOGGER.info("response status : {}", response.getStatusCodeValue());
+            if (LOGGER.isWarnEnabled() && !response.getStatusCode().equals(HttpStatus.OK)) {
+                LOGGER.warn("HTTP call SO on {} returns {} , {}",url ,response.getStatusCodeValue(), response.getBody().toString());
             }
         } else {
             LOGGER.info("no response calling url {}",url);
diff --git a/src/main/java/org/onap/nbi/apis/serviceorder/utils/JsonEntityConverter.java b/src/main/java/org/onap/nbi/apis/serviceorder/utils/JsonEntityConverter.java
index 9e8d87e..7be84c2 100644
--- a/src/main/java/org/onap/nbi/apis/serviceorder/utils/JsonEntityConverter.java
+++ b/src/main/java/org/onap/nbi/apis/serviceorder/utils/JsonEntityConverter.java
@@ -21,6 +21,9 @@ import com.fasterxml.jackson.databind.ObjectMapper;
 
 public final class JsonEntityConverter {
 
+    private JsonEntityConverter() {
+    }
+
     private static final ObjectMapper MAPPER = new ObjectMapper();
 
     public static String convertServiceOrderInfoToJson(ServiceOrderInfo serviceOrderInfo) {
diff --git a/src/main/java/org/onap/nbi/apis/serviceorder/workflow/SOTaskManager.java b/src/main/java/org/onap/nbi/apis/serviceorder/workflow/SOTaskManager.java
index 42b9fac..3365525 100644
--- a/src/main/java/org/onap/nbi/apis/serviceorder/workflow/SOTaskManager.java
+++ b/src/main/java/org/onap/nbi/apis/serviceorder/workflow/SOTaskManager.java
@@ -16,6 +16,7 @@ import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Map.Entry;
 import org.onap.nbi.apis.serviceorder.model.OrderItemRelationship;
 import org.onap.nbi.apis.serviceorder.model.ServiceOrder;
 import org.onap.nbi.apis.serviceorder.model.ServiceOrderItem;
@@ -69,13 +70,15 @@ public class SOTaskManager {
             }
             // then we replace all orderitem ids in reliedtasks field with internalid of the tasks
             for (ExecutionTask executionTask : executionTasksSaved) {
-                for (String key : internalIdOrderItemsMap.keySet()) {
-                    String replace = executionTask.getReliedTasks().replace(key,
-                        String.valueOf(internalIdOrderItemsMap.get(key)));
+                for (Entry<String, Long> entry : internalIdOrderItemsMap.entrySet()) {
+                    String replace = executionTask.getReliedTasks().replace(entry.getKey(),
+                        String.valueOf(entry.getValue()));
                     executionTask.setReliedTasks(replace);
                 }
-                LOGGER.debug("saving task with id {} , orderItemId {} , reliedtasks ", executionTask.getInternalId(),
-                    executionTask.getOrderItemId(), executionTask.getReliedTasks());
+                if(LOGGER.isDebugEnabled()) {
+                    LOGGER.debug("saving task with id {} , orderItemId {} , reliedtasks {}", executionTask.getInternalId(),
+                        executionTask.getOrderItemId(), executionTask.getReliedTasks());
+                }
                 executionTaskRepository.save(executionTask);
             }
         }
diff --git a/src/main/java/org/onap/nbi/apis/serviceorder/workflow/SOTaskProcessor.java b/src/main/java/org/onap/nbi/apis/serviceorder/workflow/SOTaskProcessor.java
index 67c9b93..66bb408 100644
--- a/src/main/java/org/onap/nbi/apis/serviceorder/workflow/SOTaskProcessor.java
+++ b/src/main/java/org/onap/nbi/apis/serviceorder/workflow/SOTaskProcessor.java
@@ -296,7 +296,7 @@ public class SOTaskProcessor {
      * Build a list of UserParams for the SO request by browsing a list of ServiceCharacteristics from SDC
      */
     private List<UserParams> retrieveUserParamsFromServiceCharacteristics(List<ServiceCharacteristic> characteristics) {
-        List<UserParams> userParams = new ArrayList<UserParams>();
+        List<UserParams> userParams = new ArrayList<>();
 
         if (!CollectionUtils.isEmpty(characteristics)) {
             for (ServiceCharacteristic characteristic : characteristics) {
diff --git a/src/main/java/org/onap/nbi/apis/status/StatusResource.java b/src/main/java/org/onap/nbi/apis/status/StatusResource.java
index 7235d2c..96332ec 100644
--- a/src/main/java/org/onap/nbi/apis/status/StatusResource.java
+++ b/src/main/java/org/onap/nbi/apis/status/StatusResource.java
@@ -31,7 +31,7 @@ import javax.servlet.http.HttpServletRequest;
 
 @RestController
 @RequestMapping("/status")
-public class StatusResource extends ResourceManagement<ApplicationStatus> {
+public class StatusResource extends ResourceManagement {
 
     @Autowired
     private StatusService statusService;
diff --git a/src/main/java/org/onap/nbi/apis/status/StatusServiceImpl.java b/src/main/java/org/onap/nbi/apis/status/StatusServiceImpl.java
index 5a19e48..a55e113 100644
--- a/src/main/java/org/onap/nbi/apis/status/StatusServiceImpl.java
+++ b/src/main/java/org/onap/nbi/apis/status/StatusServiceImpl.java
@@ -25,14 +25,8 @@ public class StatusServiceImpl implements StatusService {
     @Override
     public ApplicationStatus get(final String serviceName, final String serviceVersion) {
 
-        final boolean applicationIsUp = true;
+        return new ApplicationStatus(serviceName, (StatusType.OK), serviceVersion);
 
-
-        final ApplicationStatus applicationStatus =
-                new ApplicationStatus(serviceName, (applicationIsUp ? StatusType.OK : StatusType.KO), serviceVersion);
-
-
-        return applicationStatus;
     }
 
 
diff --git a/src/main/java/org/onap/nbi/commons/BeanUtils.java b/src/main/java/org/onap/nbi/commons/BeanUtils.java
index 164ed83..06ec2f5 100644
--- a/src/main/java/org/onap/nbi/commons/BeanUtils.java
+++ b/src/main/java/org/onap/nbi/commons/BeanUtils.java
@@ -26,6 +26,9 @@ public class BeanUtils {
 
     private static final PropertyUtilsBean PUB = new PropertyUtilsBean();
 
+    private BeanUtils() {
+    }
+
     /**
      *
      * @param bean
diff --git a/src/main/java/org/onap/nbi/commons/JacksonFilter.java b/src/main/java/org/onap/nbi/commons/JacksonFilter.java
index 21628e0..07c113e 100644
--- a/src/main/java/org/onap/nbi/commons/JacksonFilter.java
+++ b/src/main/java/org/onap/nbi/commons/JacksonFilter.java
@@ -33,8 +33,10 @@ import com.fasterxml.jackson.databind.node.ObjectNode;
 
 public class JacksonFilter {
 
-    private final static List<String> SKIPPED_FIELDS = Arrays.asList("internalId");
+    private static final List<String> SKIPPED_FIELDS = Arrays.asList("internalId");
 
+    private JacksonFilter() {
+    }
 
     public static <R> List<ObjectNode> createNodes(List<R> list, JsonRepresentation jsonRepresentation) {
 
@@ -65,7 +67,7 @@ public class JacksonFilter {
         // split fieldNames in 2 categories :
         // simpleFields for simple property names with no '.'
         // nestedFields for nested property names with a '.'
-        Set<String> simpleFields = new LinkedHashSet<String>();
+        Set<String> simpleFields = new LinkedHashSet<>();
         MultiValueMap nestedFields = new LinkedMultiValueMap();
         buildFields(names, simpleFields, nestedFields);
 
@@ -86,7 +88,7 @@ public class JacksonFilter {
                 if (nestedBean == null) {
                     continue;
                 }
-                Set<String> nestedFieldNames = new LinkedHashSet<String>(entry.getValue());
+                Set<String> nestedFieldNames = new LinkedHashSet<>(entry.getValue());
                 // current node is an array or a list
                 if ((nestedBean.getClass().isArray()) || (Collection.class.isAssignableFrom(nestedBean.getClass()))) {
                     handleListNode(mapper, rootNode, rootFieldName, nestedBean, nestedFieldNames);
@@ -133,7 +135,7 @@ public class JacksonFilter {
         if (array.length > 0) {
             // create a node for each element in array
             // and add created node in an arrayNode
-            Collection<JsonNode> nodes = new LinkedList<JsonNode>();
+            Collection<JsonNode> nodes = new LinkedList<>();
             for (Object object : array) {
                 ObjectNode nestedNode = JacksonFilter.createNode(mapper, object, nestedFieldNames);
                 if ((nestedNode != null) && (nestedNode.size() > 0)) {
diff --git a/src/main/java/org/onap/nbi/commons/QueryParserUtils.java b/src/main/java/org/onap/nbi/commons/QueryParserUtils.java
index 53a0e61..a43b5bb 100644
--- a/src/main/java/org/onap/nbi/commons/QueryParserUtils.java
+++ b/src/main/java/org/onap/nbi/commons/QueryParserUtils.java
@@ -66,10 +66,10 @@ public class QueryParserUtils {
 
         Set<Entry<String, List<String>>> entrySet = queryParameters.entrySet();
 
-        MultiValueMap<String, String> criterias = new LinkedMultiValueMap<String, String>();
+        MultiValueMap<String, String> criterias = new LinkedMultiValueMap<>();
 
         entrySet.stream().forEach(entry -> {
-            final List<String> tempValues = new ArrayList<String>();
+            final List<String> tempValues = new ArrayList<>();
             entry.getValue().stream().forEach(value -> tempValues.addAll(Arrays.asList(value.split(","))));
             criterias.put(entry.getKey(), tempValues);
         });
diff --git a/src/main/java/org/onap/nbi/commons/ResourceManagement.java b/src/main/java/org/onap/nbi/commons/ResourceManagement.java
index e90c2b0..82d9ebe 100644
--- a/src/main/java/org/onap/nbi/commons/ResourceManagement.java
+++ b/src/main/java/org/onap/nbi/commons/ResourceManagement.java
@@ -24,7 +24,7 @@ import org.springframework.http.ResponseEntity;
 import org.springframework.web.context.request.RequestContextHolder;
 import org.springframework.web.servlet.support.ServletUriComponentsBuilder;
 
-public class ResourceManagement<T extends Resource> {
+public class ResourceManagement {
 
     /**
      * Build default 201 filtered response for resource
diff --git a/src/main/java/org/onap/nbi/exceptions/ApiExceptionHandler.java b/src/main/java/org/onap/nbi/exceptions/ApiExceptionHandler.java
index dbdae6a..fa2a65b 100644
--- a/src/main/java/org/onap/nbi/exceptions/ApiExceptionHandler.java
+++ b/src/main/java/org/onap/nbi/exceptions/ApiExceptionHandler.java
@@ -31,7 +31,7 @@ public class ApiExceptionHandler {
     public ResponseEntity<ApiError> backendExceptionHandler(final BackendFunctionalException exception) {
         ApiError apiError =
                 new ApiError(String.valueOf(exception.getHttpStatus().value()), exception.getMessage(), "", "");
-        return new ResponseEntity<ApiError>(apiError, exception.getHttpStatus());
+        return new ResponseEntity<>(apiError, exception.getHttpStatus());
     }
 
     @ExceptionHandler(TechnicalException.class)
@@ -39,21 +39,21 @@ public class ApiExceptionHandler {
     public ResponseEntity<ApiError> technicalExceptionHandler(final TechnicalException exception) {
         ApiError apiError =
                 new ApiError(String.valueOf(exception.getHttpStatus().value()), exception.getMessage(), "", "");
-        return new ResponseEntity<ApiError>(apiError, exception.getHttpStatus());
+        return new ResponseEntity<>(apiError, exception.getHttpStatus());
     }
 
     @ExceptionHandler(RestClientException.class)
     @ResponseBody
-    public ResponseEntity<ApiError> RestClientExceptionHandler(final RestClientException exception) {
+    public ResponseEntity<ApiError> restClientExceptionHandler(final RestClientException exception) {
         ApiError apiError = new ApiError("500", HttpStatus.INTERNAL_SERVER_ERROR.getReasonPhrase(),
                 "Unable to " + "reach ONAP services", "");
-        return new ResponseEntity<ApiError>(apiError, HttpStatus.INTERNAL_SERVER_ERROR);
+        return new ResponseEntity<>(apiError, HttpStatus.INTERNAL_SERVER_ERROR);
     }
 
     @ExceptionHandler(ValidationException.class)
     @ResponseBody
-    public ResponseEntity<ApiError> ValidationExceptionHandler(final ValidationException exception) {
+    public ResponseEntity<ApiError> validationExceptionHandler(final ValidationException exception) {
         ApiError apiError = new ApiError("400", HttpStatus.BAD_REQUEST.getReasonPhrase(), exception.getMessages(), "");
-        return new ResponseEntity<ApiError>(apiError, HttpStatus.INTERNAL_SERVER_ERROR);
+        return new ResponseEntity<>(apiError, HttpStatus.INTERNAL_SERVER_ERROR);
     }
 }
diff --git a/src/main/java/org/onap/nbi/exceptions/BackendFunctionalException.java b/src/main/java/org/onap/nbi/exceptions/BackendFunctionalException.java
index 47257cc..e037987 100644
--- a/src/main/java/org/onap/nbi/exceptions/BackendFunctionalException.java
+++ b/src/main/java/org/onap/nbi/exceptions/BackendFunctionalException.java
@@ -19,17 +19,13 @@ import org.springframework.http.HttpStatus;
 
 public class BackendFunctionalException extends ApiException {
 
-    private HttpStatus httpStatus;
+    private final HttpStatus httpStatus;
 
     public BackendFunctionalException(HttpStatus httpStatus, String message) {
         super(message);
         this.httpStatus = httpStatus;
     }
 
-    public BackendFunctionalException() {
-        super();
-    }
-
     public HttpStatus getHttpStatus() {
         return httpStatus;
     }
diff --git a/src/main/java/org/onap/nbi/exceptions/TechnicalException.java b/src/main/java/org/onap/nbi/exceptions/TechnicalException.java
index 956a15a..14d6321 100644
--- a/src/main/java/org/onap/nbi/exceptions/TechnicalException.java
+++ b/src/main/java/org/onap/nbi/exceptions/TechnicalException.java
@@ -19,23 +19,17 @@ import org.springframework.http.HttpStatus;
 
 public class TechnicalException extends ApiException {
 
-    private HttpStatus httpStatus;
+    private final HttpStatus httpStatus;
 
     public TechnicalException(String message) {
         super(message);
         this.httpStatus = HttpStatus.INTERNAL_SERVER_ERROR;
     }
 
-    public TechnicalException() {
-        super();
-    }
 
     public HttpStatus getHttpStatus() {
         return httpStatus;
     }
 
-    public void setHttpStatus(HttpStatus httpStatus) {
-        this.httpStatus = httpStatus;
-    }
 
 }
diff --git a/src/main/java/org/onap/nbi/exceptions/ValidationException.java b/src/main/java/org/onap/nbi/exceptions/ValidationException.java
index e077333..1cf7d36 100644
--- a/src/main/java/org/onap/nbi/exceptions/ValidationException.java
+++ b/src/main/java/org/onap/nbi/exceptions/ValidationException.java
@@ -21,7 +21,7 @@ import java.util.List;
 
 public class ValidationException extends ApiException {
 
-    private String messages;
+    private final String messages;
 
     public ValidationException(List<ObjectError> listErrors) {
         super();