diff --git a/src/main/java/org/codelibs/fess/app/web/admin/design/AdminDesignAction.java b/src/main/java/org/codelibs/fess/app/web/admin/design/AdminDesignAction.java
index c5609043a..4d3fbe164 100644
--- a/src/main/java/org/codelibs/fess/app/web/admin/design/AdminDesignAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/admin/design/AdminDesignAction.java
@@ -206,7 +206,7 @@ public class AdminDesignAction extends FessAdminAction implements Serializable {
             logger.error("Failed to delete {}", file.getAbsolutePath());
             throwValidationError(messages -> messages.addErrorsFailedToDeleteFile(GLOBAL, form.fileName), toMainHtml());
         }
-        SAStrutsUtil.addSessionMessage("success.delete_file", form.fileName);
+        saveInfo(messages -> messages.addSuccessDeleteFile(GLOBAL, form.fileName));
         return redirect(getClass());
     }
 
diff --git a/src/main/java/org/codelibs/fess/app/web/base/FessAdminAction.java b/src/main/java/org/codelibs/fess/app/web/base/FessAdminAction.java
index 15dbf9b2e..f5756d943 100644
--- a/src/main/java/org/codelibs/fess/app/web/base/FessAdminAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/base/FessAdminAction.java
@@ -22,9 +22,11 @@ import javax.servlet.ServletContext;
 
 import org.codelibs.core.beans.util.BeanUtil;
 import org.codelibs.core.beans.util.CopyOptions;
+import org.codelibs.fess.mylasta.action.FessMessages;
 import org.lastaflute.di.util.LdiFileUtil;
 import org.lastaflute.web.servlet.session.SessionManager;
 import org.lastaflute.web.util.LaServletContextUtil;
+import org.lastaflute.web.validation.VaMessenger;
 
 /**
  * @author codelibs
@@ -41,6 +43,12 @@ public abstract class FessAdminAction extends FessBaseAction {
     // ===================================================================================
     //                                                                        Small Helper
     //                                                                        ============
+    protected void saveInfo(VaMessenger<FessMessages> validationMessagesLambda) {
+        FessMessages messages = createMessages();
+        validationMessagesLambda.message(messages);
+        sessionManager.info().save(messages);
+    }
+
     protected void write(String path, byte[] data) {
         LdiFileUtil.write(path, data);
     }
@@ -52,4 +60,23 @@ public abstract class FessAdminAction extends FessBaseAction {
     protected ServletContext getServletContext() {
         return LaServletContextUtil.getServletContext();
     }
+
+    // ===================================================================================
+    //                                                                            Document
+    //                                                                            ========
+    /**
+     * {@inheritDoc} <br>
+     * Application Origin Methods:
+     * <pre>
+     * <span style="font-size: 130%; color: #553000">[Small Helper]</span>
+     * o saveInfo() <span style="color: #3F7E5E">// save messages to session</span>
+     * o write() <span style="color: #3F7E5E">// write text to specified file</span>
+     * o copyBeanToBean() <span style="color: #3F7E5E">// copy bean to bean by BeanUtil</span>
+     * o getServletContext() <span style="color: #3F7E5E">// get servlet context</span>
+     * </pre>
+     */
+    @Override
+    public void document1_CallableSuperMethod() {
+        super.document1_CallableSuperMethod();
+    }
 }
diff --git a/src/main/java/org/codelibs/fess/app/web/base/FessBaseAction.java b/src/main/java/org/codelibs/fess/app/web/base/FessBaseAction.java
index badd0d474..1189db74d 100644
--- a/src/main/java/org/codelibs/fess/app/web/base/FessBaseAction.java
+++ b/src/main/java/org/codelibs/fess/app/web/base/FessBaseAction.java
@@ -31,11 +31,8 @@
  */
 package org.codelibs.fess.app.web.base;
 
-import javax.annotation.Resource;
-
 import org.codelibs.fess.mylasta.action.FessHtmlPath;
 import org.codelibs.fess.mylasta.action.FessMessages;
-import org.codelibs.fess.mylasta.direction.FessConfig;
 import org.dbflute.hook.AccessContext;
 import org.dbflute.optional.OptionalObject;
 import org.dbflute.optional.OptionalThing;
@@ -46,11 +43,8 @@ import org.lastaflute.web.callback.ActionRuntime;
 import org.lastaflute.web.login.LoginManager;
 import org.lastaflute.web.login.UserBean;
 import org.lastaflute.web.response.ActionResponse;
-import org.lastaflute.web.servlet.request.RequestManager;
-import org.lastaflute.web.servlet.session.SessionManager;
 import org.lastaflute.web.validation.ActionValidator;
 import org.lastaflute.web.validation.LaValidatable;
-import org.lastaflute.web.validation.VaMessenger;
 
 /**
  * @author jflute
@@ -64,16 +58,6 @@ public abstract class FessBaseAction extends TypicalAction // has several interf
     /** The application type for FESs, e.g. used by access context. */
     protected static final String APP_TYPE = "FES"; // #change_it_first
 
-    // ===================================================================================
-    //                                                                           Attribute
-    //                                                                           =========
-    @Resource
-    private RequestManager requestManager;
-    @Resource
-    private SessionManager sessionManager;
-    @Resource
-    private FessConfig fessConfig;
-
     // ===================================================================================
     //                                                                               Hook
     //                                                                              ======
@@ -171,32 +155,4 @@ public abstract class FessBaseAction extends TypicalAction // has several interf
     public FessMessages createMessages() { // application may call
         return new FessMessages(); // overriding to change return type to concrete-class
     }
-
-    protected void saveInfo(VaMessenger<FessMessages> validationMessagesLambda) {
-        FessMessages messages = createMessages();
-        validationMessagesLambda.message(messages);
-        sessionManager.info().save(messages);
-    }
-
-    // ===================================================================================
-    //                                                                            Document
-    //                                                                            ========
-    /**
-     * {@inheritDoc} <br>
-     * Application Origin Methods:
-     * <pre>
-     * <span style="font-size: 130%; color: #553000">[Information Message]</span>
-     * o saveInfo() <span style="color: #3F7E5E">// save messages to session</span>
-     * 
-     * <span style="font-size: 130%; color: #553000">[Conversion Helper]</span>
-     * o toDate(exp) <span style="color: #3F7E5E">// convert expression to local date</span>
-     * o toDateTime(exp) <span style="color: #3F7E5E">// convert expression to local date-time</span>
-     * o toDispDate(date) <span style="color: #3F7E5E">// convert local date to display expression</span>
-     * o toDispDateTime(date) <span style="color: #3F7E5E">// convert local date-time to display expression</span>
-     * </pre>
-     */
-    @Override
-    public void document1_CallableSuperMethod() {
-        super.document1_CallableSuperMethod();
-    }
 }