Add docUrl into metadata.

components/device-mgt/io.entgra.device.mgt.core.device.mgt.core/src/main/java/io/entgra/device/mgt/core/device/mgt/core/metadata/mgt/WhiteLabelManagementServiceImpl.java

@@ -65,6 +65,13 @@ public class WhiteLabelManagementServiceImpl implements WhiteLabelManagementServ
         initializeWhiteLabelThemes();
     }
 
+    /**
+     * Initializes white label themes for a tenant by retrieving white label metadata and updating it if necessary.
+     * If the white label metadata is found and the "DocUrl" is missing,it updates the metadata with the default value
+     * for DocUrl.
+     *
+     * @throws MetadataManagementException if an error occurs while managing metadata or transactions.
+     */
     private void initializeWhiteLabelThemes() throws MetadataManagementException {
         int tenantId = PrivilegedCarbonContext.getThreadLocalCarbonContext().getTenantId(true);
         WhiteLabelTheme defaultTheme = getDefaultWhiteLabelTheme();
@@ -83,8 +90,7 @@ public class WhiteLabelManagementServiceImpl implements WhiteLabelManagementServ
                         log.debug("WhiteLabel theme's DocUrl was missing and has been updated to the default value " +
                                 "for tenant: " + tenantId);
                     }
-                }
+                } catch (MetadataManagementDAOException e) {
-                catch (MetadataManagementDAOException e) {
                     MetadataManagementDAOFactory.rollbackTransaction();
                     String msg = "Error occurred while fetching white label metadata for tenant: " + tenantId;
                     log.error(msg, e);
@@ -165,9 +171,9 @@ public class WhiteLabelManagementServiceImpl implements WhiteLabelManagementServ
     /**
      * Useful to get white label image file response from provided url
      */
-    private FileResponse getImageFileResponseFromUrl(String url) throws IOException, NotFoundException  {
+    private FileResponse getImageFileResponseFromUrl(String url) throws IOException, NotFoundException {
         FileResponse fileResponse = new FileResponse();
-        try(CloseableHttpClient client = HttpClients.createDefault()) {
+        try (CloseableHttpClient client = HttpClients.createDefault()) {
             HttpGet imageGetRequest = new HttpGet(url);
             HttpResponse response = client.execute(imageGetRequest);
             InputStream imageStream = response.getEntity().getContent();
@@ -389,9 +395,9 @@ public class WhiteLabelManagementServiceImpl implements WhiteLabelManagementServ
      * those can be passed to this method in order to restore.
      *
      * @param existingFavicon existing favicon image file
-     * @param existingLogo existing logo image file
+     * @param existingLogo    existing logo image file
      */
-    private void restoreWhiteLabelImages(File existingFavicon, File existingLogo,  File existingLogoIcon, int tenantId)
+    private void restoreWhiteLabelImages(File existingFavicon, File existingLogo, File existingLogoIcon, int tenantId)
             throws MetadataManagementException {
         WhiteLabelStorageUtil.deleteWhiteLabelImageForTenantIfExists(tenantId);
         if (existingFavicon != null) {
@@ -410,7 +416,7 @@ public class WhiteLabelManagementServiceImpl implements WhiteLabelManagementServ
      * For example if the provided white label image is of URL type it doesn't need to be stored
      *
      * @param whiteLabelImage image to be stored
-     * @param imageName (i.e: FAVICON)
+     * @param imageName       (i.e: FAVICON)
      */
     private void storeWhiteLabelImageIfRequired(WhiteLabelImageRequestPayload whiteLabelImage,
                                                 WhiteLabelImage.ImageName imageName, int tenantId)
@@ -474,7 +480,7 @@ public class WhiteLabelManagementServiceImpl implements WhiteLabelManagementServ
      * updates the given WhiteLabelTheme with default value for docUrl
      *
      * @param whiteLabelTheme the WhiteLabelTheme to be updated with defaults if necessary.
-     * @param tenantId the ID of the tenant whose metadata is being updated.
+     * @param tenantId        the ID of the tenant whose metadata is being updated.
      * @throws MetadataManagementException exception for an error occurs during the update or transaction commit.
      */
     private void updateWhiteLabelThemeWithDefaults(WhiteLabelTheme whiteLabelTheme, int tenantId)
@@ -528,12 +534,13 @@ public class WhiteLabelManagementServiceImpl implements WhiteLabelManagementServ
 
     /**
      * Load White label Meta Data for given tenant Id.
+     *
      * @param tenantId Id of the tenant
      * @return {@link Metadata}
      * @throws MetadataManagementException if an error occurred while getting Meta-Data info from Database for a
-     * given tenant ID.
+     *                                     given tenant ID.
      */
-    private Metadata getWhiteLabelMetaData (int tenantId) throws MetadataManagementException {
+    private Metadata getWhiteLabelMetaData(int tenantId) throws MetadataManagementException {
         try {
             MetadataManagementDAOFactory.openConnection();
             return metadataDAO.getMetadata(tenantId, MetadataConstants.WHITELABEL_META_KEY);