Add metadata info shown in ShardingSphere-UI
diff --git a/shardingsphere-ui-backend/src/main/java/org/apache/shardingsphere/ui/servcie/MetadataCenterService.java b/shardingsphere-ui-backend/src/main/java/org/apache/shardingsphere/ui/servcie/MetadataCenterService.java
index 8ebb42d..322589d 100644
--- a/shardingsphere-ui-backend/src/main/java/org/apache/shardingsphere/ui/servcie/MetadataCenterService.java
+++ b/shardingsphere-ui-backend/src/main/java/org/apache/shardingsphere/ui/servcie/MetadataCenterService.java
@@ -20,7 +20,7 @@
 import org.apache.shardingsphere.orchestration.core.metadatacenter.MetaDataCenterNode;
 
 /**
- * metadata center service.
+ * Metadata center service.
  **/
 public interface MetadataCenterService {
 
@@ -30,5 +30,4 @@
      * @return metadata center node
      */
     MetaDataCenterNode getActivateMetaDataCenterNode();
-
 }
diff --git a/shardingsphere-ui-backend/src/main/java/org/apache/shardingsphere/ui/servcie/impl/MetadataCenterServiceImpl.java b/shardingsphere-ui-backend/src/main/java/org/apache/shardingsphere/ui/servcie/impl/MetadataCenterServiceImpl.java
index 56572fa..feda0a7 100644
--- a/shardingsphere-ui-backend/src/main/java/org/apache/shardingsphere/ui/servcie/impl/MetadataCenterServiceImpl.java
+++ b/shardingsphere-ui-backend/src/main/java/org/apache/shardingsphere/ui/servcie/impl/MetadataCenterServiceImpl.java
@@ -32,7 +32,7 @@
  * Implementation of metadata center operation service.
  */
 @Service
-public class MetadataCenterServiceImpl implements MetadataCenterService {
+public final class MetadataCenterServiceImpl implements MetadataCenterService {
 
     @Resource
     private CenterConfigService centerConfigService;
@@ -45,5 +45,4 @@
         }
         throw new ShardingSphereUIException(ShardingSphereUIException.SERVER_ERROR, "No activated metadata center!");
     }
-
 }
diff --git a/shardingsphere-ui-backend/src/main/java/org/apache/shardingsphere/ui/servcie/impl/ShardingSchemaServiceImpl.java b/shardingsphere-ui-backend/src/main/java/org/apache/shardingsphere/ui/servcie/impl/ShardingSchemaServiceImpl.java
index e7cbf64..ec2bbbd 100644
--- a/shardingsphere-ui-backend/src/main/java/org/apache/shardingsphere/ui/servcie/impl/ShardingSchemaServiceImpl.java
+++ b/shardingsphere-ui-backend/src/main/java/org/apache/shardingsphere/ui/servcie/impl/ShardingSchemaServiceImpl.java
@@ -96,7 +96,7 @@
     }
 
     @Override
-    public String getMetadataConfiguration(String schemaName) {
+    public String getMetadataConfiguration(final String schemaName) {
         return configCenterService.getActivatedConfigCenter().get(
                 metadataCenterService.getActivateMetaDataCenterNode().getMetaDataCenterNodeFullPath(schemaName));
     }
diff --git a/shardingsphere-ui-backend/src/main/java/org/apache/shardingsphere/ui/web/controller/ShardingSchemaController.java b/shardingsphere-ui-backend/src/main/java/org/apache/shardingsphere/ui/web/controller/ShardingSchemaController.java
index 63decde..8a0376f 100644
--- a/shardingsphere-ui-backend/src/main/java/org/apache/shardingsphere/ui/web/controller/ShardingSchemaController.java
+++ b/shardingsphere-ui-backend/src/main/java/org/apache/shardingsphere/ui/web/controller/ShardingSchemaController.java
@@ -125,6 +125,7 @@
 
     /**
      * Load meta data configuration.
+     *
      * @param schemaName schema name
      * @return response result
      */