diff --git a/build.gradle b/build.gradle
index 8eff071..ccfd7b6 100644
--- a/build.gradle
+++ b/build.gradle
@@ -1,6 +1,7 @@
 plugins {
     id 'org.springframework.boot' version '2.1.4.RELEASE'
     id 'java'
+    id "org.sonarqube" version "2.7"
 }
 
 apply plugin: 'io.spring.dependency-management'
diff --git a/src/main/java/com/rest/api/advice/ExceptionAdvice.java b/src/main/java/com/rest/api/advice/ExceptionAdvice.java
index c0b475a..7ed7d40 100644
--- a/src/main/java/com/rest/api/advice/ExceptionAdvice.java
+++ b/src/main/java/com/rest/api/advice/ExceptionAdvice.java
@@ -51,7 +51,7 @@ public class ExceptionAdvice {
 
     @ExceptionHandler(AccessDeniedException.class)
     @ResponseStatus(HttpStatus.UNAUTHORIZED)
-    public CommonResult AccessDeniedException(HttpServletRequest request, AccessDeniedException e) {
+    public CommonResult accessDeniedException(HttpServletRequest request, AccessDeniedException e) {
         return responseService.getFailResult(Integer.valueOf(getMessage("accessDenied.code")), getMessage("accessDenied.msg"));
     }
 
diff --git a/src/main/java/com/rest/api/config/MessageConfiguration.java b/src/main/java/com/rest/api/config/MessageConfiguration.java
index ce36020..bff452a 100644
--- a/src/main/java/com/rest/api/config/MessageConfiguration.java
+++ b/src/main/java/com/rest/api/config/MessageConfiguration.java
@@ -1,6 +1,5 @@
 package com.rest.api.config;
 
-import lombok.extern.slf4j.Slf4j;
 import net.rakugakibox.util.YamlResourceBundle;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.context.MessageSource;
@@ -14,7 +13,6 @@ import org.springframework.web.servlet.i18n.LocaleChangeInterceptor;
 import org.springframework.web.servlet.i18n.SessionLocaleResolver;
 
 import java.util.Locale;
-import java.util.MissingResourceException;
 import java.util.ResourceBundle;
 
 @Configuration
@@ -56,7 +54,7 @@ public class MessageConfiguration implements WebMvcConfigurer {
     // locale 정보에 따라 다른 yml 파일을 읽도록 처리
     private static class YamlMessageSource extends ResourceBundleMessageSource {
         @Override
-        protected ResourceBundle doGetBundle(String basename, Locale locale) throws MissingResourceException {
+        protected ResourceBundle doGetBundle(String basename, Locale locale) {
             return ResourceBundle.getBundle(basename, locale, YamlResourceBundle.Control.INSTANCE);
         }
     }
diff --git a/src/main/java/com/rest/api/config/security/CustomAccessDeniedHandler.java b/src/main/java/com/rest/api/config/security/CustomAccessDeniedHandler.java
index eaaa3cb..8b30ba8 100644
--- a/src/main/java/com/rest/api/config/security/CustomAccessDeniedHandler.java
+++ b/src/main/java/com/rest/api/config/security/CustomAccessDeniedHandler.java
@@ -1,8 +1,6 @@
 package com.rest.api.config.security;
 
 import lombok.extern.slf4j.Slf4j;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 import org.springframework.security.access.AccessDeniedException;
 import org.springframework.security.web.access.AccessDeniedHandler;
 import org.springframework.stereotype.Component;
@@ -17,12 +15,10 @@ import java.io.IOException;
 @Component
 public class CustomAccessDeniedHandler implements AccessDeniedHandler {
 
-	private static final Logger logger = LoggerFactory.getLogger(CustomAccessDeniedHandler.class);
-
-	@Override
-	public void handle(HttpServletRequest request, HttpServletResponse response, AccessDeniedException exception) throws IOException,
+    @Override
+    public void handle(HttpServletRequest request, HttpServletResponse response, AccessDeniedException exception) throws IOException,
             ServletException {
-		RequestDispatcher dispatcher = request.getRequestDispatcher("/exception/accessdenied");
-		dispatcher.forward(request, response);
-	}
+        RequestDispatcher dispatcher = request.getRequestDispatcher("/exception/accessdenied");
+        dispatcher.forward(request, response);
+    }
 }
diff --git a/src/main/java/com/rest/api/controller/HelloController.java b/src/main/java/com/rest/api/controller/HelloController.java
index 22f68dd..f8241a0 100644
--- a/src/main/java/com/rest/api/controller/HelloController.java
+++ b/src/main/java/com/rest/api/controller/HelloController.java
@@ -9,6 +9,8 @@ import org.springframework.web.bind.annotation.ResponseBody;
 @Controller
 public class HelloController {
 
+    private static final String HELLO = "helloworld";
+
     @Setter
     @Getter
     public static class Hello {
@@ -18,19 +20,19 @@ public class HelloController {
     @GetMapping(value = "/helloworld/string")
     @ResponseBody
     public String helloworldString() {
-        return "helloworld";
+        return HELLO;
     }
 
     @GetMapping(value = "/helloworld/json")
     @ResponseBody
     public Hello helloworldJson() {
         Hello hello = new Hello();
-        hello.message = "helloworld";
+        hello.message = HELLO;
         return hello;
     }
 
     @GetMapping(value = "/helloworld/page")
     public String helloworld() {
-        return "helloworld";
+        return HELLO;
     }
 }