diff --git a/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/api/changes/ChangeEditApi.java b/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/api/changes/ChangeEditApi.java
index 33f17e9903..9d0275ac19 100644
--- a/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/api/changes/ChangeEditApi.java
+++ b/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/api/changes/ChangeEditApi.java
@@ -156,67 +156,67 @@ public interface ChangeEditApi {
    */
   class NotImplemented implements ChangeEditApi {
     @Override
-    public Optional<EditInfo> get() {
+    public Optional<EditInfo> get() throws RestApiException {
       throw new NotImplementedException();
     }
 
     @Override
-    public void create() {
+    public void create() throws RestApiException {
       throw new NotImplementedException();
     }
 
     @Override
-    public void delete() {
+    public void delete() throws RestApiException {
       throw new NotImplementedException();
     }
 
     @Override
-    public void rebase() {
+    public void rebase() throws RestApiException {
       throw new NotImplementedException();
     }
 
     @Override
-    public void publish() {
+    public void publish() throws RestApiException {
       throw new NotImplementedException();
     }
 
     @Override
-    public void publish(PublishChangeEditInput publishChangeEditInput) {
+    public void publish(PublishChangeEditInput publishChangeEditInput) throws RestApiException {
       throw new NotImplementedException();
     }
 
     @Override
-    public Optional<BinaryResult> getFile(String filePath) {
+    public Optional<BinaryResult> getFile(String filePath) throws RestApiException {
       throw new NotImplementedException();
     }
 
     @Override
-    public void renameFile(String oldFilePath, String newFilePath) {
+    public void renameFile(String oldFilePath, String newFilePath) throws RestApiException {
       throw new NotImplementedException();
     }
 
     @Override
-    public void restoreFile(String filePath) {
+    public void restoreFile(String filePath) throws RestApiException {
       throw new NotImplementedException();
     }
 
     @Override
-    public void modifyFile(String filePath, RawInput newContent) {
+    public void modifyFile(String filePath, RawInput newContent) throws RestApiException {
       throw new NotImplementedException();
     }
 
     @Override
-    public void deleteFile(String filePath) {
+    public void deleteFile(String filePath) throws RestApiException {
       throw new NotImplementedException();
     }
 
     @Override
-    public String getCommitMessage() {
+    public String getCommitMessage() throws RestApiException {
       throw new NotImplementedException();
     }
 
     @Override
-    public void modifyCommitMessage(String newCommitMessage) {
+    public void modifyCommitMessage(String newCommitMessage) throws RestApiException {
       throw new NotImplementedException();
     }
   }
diff --git a/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/api/projects/ProjectApi.java b/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/api/projects/ProjectApi.java
index 1401e0652b..55849cc74d 100644
--- a/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/api/projects/ProjectApi.java
+++ b/gerrit-extension-api/src/main/java/com/google/gerrit/extensions/api/projects/ProjectApi.java
@@ -193,7 +193,7 @@ public interface ProjectApi {
     }
 
     @Override
-    public List<ProjectInfo> children() {
+    public List<ProjectInfo> children() throws RestApiException {
       throw new NotImplementedException();
     }
 
diff --git a/gerrit-gwtui/src/main/java/com/google/gerrit/client/editor/EditPreferencesBox.java b/gerrit-gwtui/src/main/java/com/google/gerrit/client/editor/EditPreferencesBox.java
index 328c3a0d2a..6ef71e6eab 100644
--- a/gerrit-gwtui/src/main/java/com/google/gerrit/client/editor/EditPreferencesBox.java
+++ b/gerrit-gwtui/src/main/java/com/google/gerrit/client/editor/EditPreferencesBox.java
@@ -225,7 +225,6 @@ public class EditPreferencesBox extends Composite {
     }
   }
 
-
   @UiHandler("autoCloseBrackets")
   void onCloseBrackets(ValueChangeEvent<Boolean> e) {
     prefs.autoCloseBrackets(e.getValue());