diff --git a/backend/portal-service/src/main/java/org/egovframe/cloud/portalservice/service/menu/MenuService.java b/backend/portal-service/src/main/java/org/egovframe/cloud/portalservice/service/menu/MenuService.java
index fd0de08..025f79c 100644
--- a/backend/portal-service/src/main/java/org/egovframe/cloud/portalservice/service/menu/MenuService.java
+++ b/backend/portal-service/src/main/java/org/egovframe/cloud/portalservice/service/menu/MenuService.java
@@ -103,7 +103,7 @@ public class MenuService extends AbstractService {
      * @return
      */
     @Transactional
-    public MenuTreeResponseDto updateName(Long menuId, String name) {
+    public MenuTreeResponseDto updateName(Long menuId, String name) throws EntityNotFoundException {
         Menu menu = menuRepository.findById(menuId)
                 .orElseThrow(() ->
                         new EntityNotFoundException(getMessage("valid.notexists.format", new Object[]{getMessage("menu")}) + " ID= " + menuId));
@@ -122,7 +122,7 @@ public class MenuService extends AbstractService {
      * @return
      */
     @Transactional
-    public MenuResponseDto update(Long menuId, MenuUpdateRequestDto updateRequestDto) {
+    public MenuResponseDto update(Long menuId, MenuUpdateRequestDto updateRequestDto) throws EntityNotFoundException, BusinessMessageException {
         Menu menu = menuRepository.findById(menuId)
                 .orElseThrow(() ->
                         new EntityNotFoundException(getMessage("valid.notexists.format", new Object[]{getMessage("menu")}) + " ID= " + menuId));
diff --git a/backend/portal-service/src/main/java/org/egovframe/cloud/portalservice/utils/FileStorageUtils.java b/backend/portal-service/src/main/java/org/egovframe/cloud/portalservice/utils/FileStorageUtils.java
index 3f9e7e1..92b6a56 100644
--- a/backend/portal-service/src/main/java/org/egovframe/cloud/portalservice/utils/FileStorageUtils.java
+++ b/backend/portal-service/src/main/java/org/egovframe/cloud/portalservice/utils/FileStorageUtils.java
@@ -104,7 +104,7 @@ public class FileStorageUtils implements StorageUtils {
         try {
             mimeType = Files.probeContentType(filePath);
         } catch (IOException ex) {
-            //ignore
+            log.error("Files.probeContentType", ex);
         }
 
         return mimeType == null ? URLConnection.guessContentTypeFromName(filePath.toString()) : mimeType;
@@ -279,24 +279,25 @@ public class FileStorageUtils implements StorageUtils {
      * image 태그에서 호출 시 byte 배열로 return
      *
      * @param imagename
-     * @return
+     * @return public String getContentType(String filename) {
      * @throws IOException
      */
     public AttachmentImageResponseDto loadImage(String imagename) {
         try {
             Path imagePath = this.fileStorageLocation.resolve(imagename).normalize();
             try (InputStream is = new FileInputStream(imagePath.toFile())) {
-                ByteArrayOutputStream buffer = new ByteArrayOutputStream();
-                int read;
-                byte[] data = new byte[(int) imagePath.toFile().length()];
-                while ((read = is.read(data, 0, data.length)) != -1) {
-                    buffer.write(data, 0, read);
-                }
+                try (ByteArrayOutputStream buffer = new ByteArrayOutputStream()) {
+                    int read;
+                    byte[] data = new byte[(int) imagePath.toFile().length()];
+                    while ((read = is.read(data, 0, data.length)) != -1) {
+                        buffer.write(data, 0, read);
+                    }
 
-                return AttachmentImageResponseDto.builder()
-                        .mimeType(getContentType(imagename))
-                        .data(data)
-                        .build();
+                    return AttachmentImageResponseDto.builder()
+                            .mimeType(getContentType(imagename))
+                            .data(data)
+                            .build();
+                }
             }
 
         } catch (FileNotFoundException | NoSuchFileException ex) {
diff --git a/backend/portal-service/src/main/java/org/egovframe/cloud/portalservice/utils/FtpStorageUtils.java b/backend/portal-service/src/main/java/org/egovframe/cloud/portalservice/utils/FtpStorageUtils.java
index 78e62d7..bb4d4ce 100644
--- a/backend/portal-service/src/main/java/org/egovframe/cloud/portalservice/utils/FtpStorageUtils.java
+++ b/backend/portal-service/src/main/java/org/egovframe/cloud/portalservice/utils/FtpStorageUtils.java
@@ -208,7 +208,7 @@ public class FtpStorageUtils implements StorageUtils {
      * @param isTemp   .temp 파일 생성 여부
      * @return
      */
-    public String storeFile(MultipartFile file, String basePath, boolean isTemp) {
+    public String storeFile(MultipartFile file, String basePath, boolean isTemp) throws BusinessMessageException {
         String filename = getPhysicalFileName(file.getOriginalFilename(), isTemp);
 
         if (filename.contains("..")) {