diff --git a/src/main/java/run/halo/app/controller/admin/api/BackupController.java b/src/main/java/run/halo/app/controller/admin/api/BackupController.java
new file mode 100644
index 0000000000000000000000000000000000000000..21b178712817640e8742034a071ffd49fab80239
--- /dev/null
+++ b/src/main/java/run/halo/app/controller/admin/api/BackupController.java
@@ -0,0 +1,22 @@
+package run.halo.app.controller.admin.api;
+
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import run.halo.app.service.BackupService;
+
+/**
+ * Backup controller
+ *
+ * @author johnniang
+ * @date 19-4-26
+ */
+@RestController
+@RequestMapping("/api/admin/backups")
+public class BackupController {
+
+    private final BackupService backupService;
+
+    public BackupController(BackupService backupService) {
+        this.backupService = backupService;
+    }
+}
diff --git a/src/main/java/run/halo/app/controller/admin/api/RecoveryController.java b/src/main/java/run/halo/app/controller/admin/api/RecoveryController.java
new file mode 100644
index 0000000000000000000000000000000000000000..a7af13d5f7c5c0df5ee32a71ad6f4ae8bf5abeb1
--- /dev/null
+++ b/src/main/java/run/halo/app/controller/admin/api/RecoveryController.java
@@ -0,0 +1,22 @@
+package run.halo.app.controller.admin.api;
+
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import run.halo.app.service.RecoveryService;
+
+/**
+ * Recovery controller
+ *
+ * @author johnniang
+ * @date 19-4-26
+ */
+@RestController
+@RequestMapping("/api/admin/recoveries")
+public class RecoveryController {
+
+    private final RecoveryService recoveryService;
+
+    public RecoveryController(RecoveryService recoveryService) {
+        this.recoveryService = recoveryService;
+    }
+}
diff --git a/src/main/java/run/halo/app/controller/core/CommonController.java b/src/main/java/run/halo/app/controller/core/CommonController.java
index 43d6729fe7307f2dd17e6db73df8a442260ed00a..bdb1616c4582f24356ddc4abe6f2bb44153ba449 100644
--- a/src/main/java/run/halo/app/controller/core/CommonController.java
+++ b/src/main/java/run/halo/app/controller/core/CommonController.java
@@ -35,15 +35,10 @@ public class CommonController implements ErrorController {
 
     private final ThemeService themeService;
 
-    private final OptionService optionService;
-
-    public CommonController(ThemeService themeService,
-                            OptionService optionService) {
+    public CommonController(ThemeService themeService) {
         this.themeService = themeService;
-        this.optionService = optionService;
     }
 
-
     /**
      * Handle error
      *
@@ -109,7 +104,7 @@ public class CommonController implements ErrorController {
      * @return String
      */
     @GetMapping(value = "/404")
-    public String contentNotFround() throws FileNotFoundException {
+    public String contentNotFround() {
         if (!themeService.isTemplateExist(NOT_FROUND_TEMPLATE)) {
             return "common/error/404";
         }
diff --git a/src/main/java/run/halo/app/event/post/PostVisitEventListener.java b/src/main/java/run/halo/app/event/post/PostVisitEventListener.java
index b37b15c149feaab9e662e58e69c320bea8972414..622adb7cfde7b84622cc6b41b8488695b7fcd42e 100644
--- a/src/main/java/run/halo/app/event/post/PostVisitEventListener.java
+++ b/src/main/java/run/halo/app/event/post/PostVisitEventListener.java
@@ -1,6 +1,5 @@
 package run.halo.app.event.post;
 
-import lombok.extern.slf4j.Slf4j;
 import org.springframework.context.event.EventListener;
 import org.springframework.scheduling.annotation.Async;
 import org.springframework.stereotype.Component;
@@ -12,7 +11,6 @@ import run.halo.app.service.PostService;
  * @author johnniang
  * @date 19-4-22
  */
-@Slf4j
 @Component
 public class PostVisitEventListener extends AbstractVisitEventListener {
 
diff --git a/src/main/java/run/halo/app/event/post/SheetVisitEventListener.java b/src/main/java/run/halo/app/event/post/SheetVisitEventListener.java
index 384622997d9904263f67dd6074aa756316009976..2b6440cc5628551fe4e83c338bacdbcb5b76b077 100644
--- a/src/main/java/run/halo/app/event/post/SheetVisitEventListener.java
+++ b/src/main/java/run/halo/app/event/post/SheetVisitEventListener.java
@@ -2,6 +2,7 @@ package run.halo.app.event.post;
 
 import org.springframework.context.event.EventListener;
 import org.springframework.scheduling.annotation.Async;
+import org.springframework.stereotype.Component;
 import run.halo.app.service.SheetService;
 
 /**
@@ -10,6 +11,7 @@ import run.halo.app.service.SheetService;
  * @author johnniang
  * @date 19-4-24
  */
+@Component
 public class SheetVisitEventListener extends AbstractVisitEventListener {
 
     protected SheetVisitEventListener(SheetService sheetService) {
diff --git a/src/main/java/run/halo/app/service/BackupService.java b/src/main/java/run/halo/app/service/BackupService.java
new file mode 100644
index 0000000000000000000000000000000000000000..fe25e70afc74388368ad53bac0eda6824d65c8aa
--- /dev/null
+++ b/src/main/java/run/halo/app/service/BackupService.java
@@ -0,0 +1,10 @@
+package run.halo.app.service;
+
+/**
+ * Backup service interface.
+ *
+ * @author johnniang
+ * @date 19-4-26
+ */
+public interface BackupService {
+}
diff --git a/src/main/java/run/halo/app/service/RecoveryService.java b/src/main/java/run/halo/app/service/RecoveryService.java
new file mode 100644
index 0000000000000000000000000000000000000000..1a70c017f66078bb4207c5909a32550c8494e9fa
--- /dev/null
+++ b/src/main/java/run/halo/app/service/RecoveryService.java
@@ -0,0 +1,11 @@
+package run.halo.app.service;
+
+/**
+ * Recovery service interface.
+ *
+ * @author johnniang
+ * @date 19-4-26
+ */
+public interface RecoveryService {
+
+}
diff --git a/src/main/java/run/halo/app/service/impl/BackupServiceImpl.java b/src/main/java/run/halo/app/service/impl/BackupServiceImpl.java
new file mode 100644
index 0000000000000000000000000000000000000000..5e800df1a258ed8a84a2a50eece5af8452b126ff
--- /dev/null
+++ b/src/main/java/run/halo/app/service/impl/BackupServiceImpl.java
@@ -0,0 +1,15 @@
+package run.halo.app.service.impl;
+
+import org.springframework.stereotype.Service;
+import run.halo.app.service.BackupService;
+
+/**
+ * Backup service implementation.
+ *
+ * @author johnniang
+ * @date 19-4-26
+ */
+@Service
+public class BackupServiceImpl implements BackupService {
+
+}
diff --git a/src/main/java/run/halo/app/service/impl/RecoveryServiceImpl.java b/src/main/java/run/halo/app/service/impl/RecoveryServiceImpl.java
new file mode 100644
index 0000000000000000000000000000000000000000..ff0fcdf7b70bdae9f9295972482368d25c1a19f1
--- /dev/null
+++ b/src/main/java/run/halo/app/service/impl/RecoveryServiceImpl.java
@@ -0,0 +1,15 @@
+package run.halo.app.service.impl;
+
+import org.springframework.stereotype.Service;
+import run.halo.app.service.RecoveryService;
+
+/**
+ * Recovery service implementation.
+ *
+ * @author johnniang
+ * @date 19-4-26
+ */
+@Service
+public class RecoveryServiceImpl implements RecoveryService {
+
+}