diff --git a/core/src/main/java/com/opensymphony/xwork2/interceptor/AliasInterceptor.java b/core/src/main/java/com/opensymphony/xwork2/interceptor/AliasInterceptor.java
index 9edafe3fc..334525d27 100644
--- a/core/src/main/java/com/opensymphony/xwork2/interceptor/AliasInterceptor.java
+++ b/core/src/main/java/com/opensymphony/xwork2/interceptor/AliasInterceptor.java
@@ -20,21 +20,22 @@ package com.opensymphony.xwork2.interceptor;
 
 import com.opensymphony.xwork2.ActionContext;
 import com.opensymphony.xwork2.ActionInvocation;
+import com.opensymphony.xwork2.LocalizedTextProvider;
 import com.opensymphony.xwork2.config.entities.ActionConfig;
 import com.opensymphony.xwork2.inject.Inject;
 import com.opensymphony.xwork2.security.AcceptedPatternsChecker;
 import com.opensymphony.xwork2.security.ExcludedPatternsChecker;
 import com.opensymphony.xwork2.util.ClearableValueStack;
 import com.opensymphony.xwork2.util.Evaluated;
-import com.opensymphony.xwork2.LocalizedTextProvider;
 import com.opensymphony.xwork2.util.ValueStack;
 import com.opensymphony.xwork2.util.ValueStackFactory;
 import com.opensymphony.xwork2.util.reflection.ReflectionContextState;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.apache.struts2.StrutsConstants;
 import org.apache.struts2.dispatcher.HttpParameters;
 import org.apache.struts2.dispatcher.Parameter;
-import org.apache.struts2.StrutsConstants;
+import org.apache.struts2.interceptor.ValidationAware;
 
 import java.util.Map;
 
@@ -108,7 +109,7 @@ public class AliasInterceptor extends AbstractInterceptor {
     @Inject(StrutsConstants.STRUTS_DEVMODE)
     public void setDevMode(String mode) {
         this.devMode = Boolean.parseBoolean(mode);
-    }   
+    }
 
     @Inject
     public void setValueStackFactory(ValueStackFactory valueStackFactory) {
@@ -225,7 +226,7 @@ public class AliasInterceptor extends AbstractInterceptor {
                 LOG.debug("invalid alias expression: {}", aliasesKey);
             }
         }
-        
+
         return invocation.invoke();
     }
 
diff --git a/core/src/main/java/com/opensymphony/xwork2/interceptor/ChainingInterceptor.java b/core/src/main/java/com/opensymphony/xwork2/interceptor/ChainingInterceptor.java
index 31b0075a3..7284dc037 100644
--- a/core/src/main/java/com/opensymphony/xwork2/interceptor/ChainingInterceptor.java
+++ b/core/src/main/java/com/opensymphony/xwork2/interceptor/ChainingInterceptor.java
@@ -21,18 +21,23 @@ package com.opensymphony.xwork2.interceptor;
 import com.opensymphony.xwork2.ActionChainResult;
 import com.opensymphony.xwork2.ActionInvocation;
 import com.opensymphony.xwork2.Result;
-import com.opensymphony.xwork2.Unchainable;
 import com.opensymphony.xwork2.inject.Inject;
-import com.opensymphony.xwork2.util.ProxyUtil;
 import com.opensymphony.xwork2.util.CompoundRoot;
+import com.opensymphony.xwork2.util.ProxyUtil;
 import com.opensymphony.xwork2.util.TextParseUtil;
 import com.opensymphony.xwork2.util.ValueStack;
-import org.apache.logging.log4j.Logger;
-import org.apache.logging.log4j.LogManager;
 import com.opensymphony.xwork2.util.reflection.ReflectionProvider;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 import org.apache.struts2.StrutsConstants;
+import org.apache.struts2.Unchainable;
 
-import java.util.*;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
 
 
 /**
diff --git a/core/src/main/java/com/opensymphony/xwork2/interceptor/ConversionErrorInterceptor.java b/core/src/main/java/com/opensymphony/xwork2/interceptor/ConversionErrorInterceptor.java
index ee8e39281..b549cc019 100644
--- a/core/src/main/java/com/opensymphony/xwork2/interceptor/ConversionErrorInterceptor.java
+++ b/core/src/main/java/com/opensymphony/xwork2/interceptor/ConversionErrorInterceptor.java
@@ -24,6 +24,7 @@ import com.opensymphony.xwork2.conversion.impl.ConversionData;
 import com.opensymphony.xwork2.conversion.impl.XWorkConverter;
 import com.opensymphony.xwork2.util.ValueStack;
 import org.apache.commons.text.StringEscapeUtils;
+import org.apache.struts2.interceptor.ValidationAware;
 
 import java.util.HashMap;
 import java.util.Map;
diff --git a/core/src/main/java/com/opensymphony/xwork2/interceptor/DefaultWorkflowInterceptor.java b/core/src/main/java/com/opensymphony/xwork2/interceptor/DefaultWorkflowInterceptor.java
index d2cbd0b78..05749ae19 100644
--- a/core/src/main/java/com/opensymphony/xwork2/interceptor/DefaultWorkflowInterceptor.java
+++ b/core/src/main/java/com/opensymphony/xwork2/interceptor/DefaultWorkflowInterceptor.java
@@ -25,6 +25,9 @@ import org.apache.commons.lang3.StringUtils;
 import org.apache.commons.lang3.reflect.MethodUtils;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.apache.struts2.interceptor.ValidationAware;
+import org.apache.struts2.interceptor.ValidationErrorAware;
+import org.apache.struts2.interceptor.ValidationWorkflowAware;
 
 /**
  * <!-- START SNIPPET: description -->
diff --git a/core/src/main/java/com/opensymphony/xwork2/interceptor/ModelDrivenInterceptor.java b/core/src/main/java/com/opensymphony/xwork2/interceptor/ModelDrivenInterceptor.java
index fa90a315c..f513deb1c 100644
--- a/core/src/main/java/com/opensymphony/xwork2/interceptor/ModelDrivenInterceptor.java
+++ b/core/src/main/java/com/opensymphony/xwork2/interceptor/ModelDrivenInterceptor.java
@@ -19,9 +19,9 @@
 package com.opensymphony.xwork2.interceptor;
 
 import com.opensymphony.xwork2.ActionInvocation;
-import com.opensymphony.xwork2.ModelDriven;
 import com.opensymphony.xwork2.util.CompoundRoot;
 import com.opensymphony.xwork2.util.ValueStack;
+import org.apache.struts2.ModelDriven;
 
 /**
  * <!-- START SNIPPET: description -->
diff --git a/core/src/main/java/com/opensymphony/xwork2/interceptor/PrepareInterceptor.java b/core/src/main/java/com/opensymphony/xwork2/interceptor/PrepareInterceptor.java
index 4516d760c..e4d5af634 100644
--- a/core/src/main/java/com/opensymphony/xwork2/interceptor/PrepareInterceptor.java
+++ b/core/src/main/java/com/opensymphony/xwork2/interceptor/PrepareInterceptor.java
@@ -19,9 +19,7 @@
 package com.opensymphony.xwork2.interceptor;
 
 import com.opensymphony.xwork2.ActionInvocation;
-import com.opensymphony.xwork2.Preparable;
-import org.apache.logging.log4j.Logger;
-import org.apache.logging.log4j.LogManager;
+import org.apache.struts2.Preparable;
 
 import java.lang.reflect.InvocationTargetException;
 
diff --git a/core/src/main/java/com/opensymphony/xwork2/interceptor/ScopedModelDrivenInterceptor.java b/core/src/main/java/com/opensymphony/xwork2/interceptor/ScopedModelDrivenInterceptor.java
index 22da179d4..ae2266be0 100644
--- a/core/src/main/java/com/opensymphony/xwork2/interceptor/ScopedModelDrivenInterceptor.java
+++ b/core/src/main/java/com/opensymphony/xwork2/interceptor/ScopedModelDrivenInterceptor.java
@@ -24,6 +24,7 @@ import com.opensymphony.xwork2.ObjectFactory;
 import com.opensymphony.xwork2.config.entities.ActionConfig;
 import com.opensymphony.xwork2.inject.Inject;
 import org.apache.struts2.StrutsException;
+import org.apache.struts2.interceptor.ScopedModelDriven;
 
 import java.lang.reflect.Method;
 import java.util.Map;
diff --git a/core/src/main/java/com/opensymphony/xwork2/interceptor/StaticParametersInterceptor.java b/core/src/main/java/com/opensymphony/xwork2/interceptor/StaticParametersInterceptor.java
index 9d32a8a18..d560e1dd4 100644
--- a/core/src/main/java/com/opensymphony/xwork2/interceptor/StaticParametersInterceptor.java
+++ b/core/src/main/java/com/opensymphony/xwork2/interceptor/StaticParametersInterceptor.java
@@ -20,11 +20,11 @@ package com.opensymphony.xwork2.interceptor;
 
 import com.opensymphony.xwork2.ActionContext;
 import com.opensymphony.xwork2.ActionInvocation;
+import com.opensymphony.xwork2.LocalizedTextProvider;
 import com.opensymphony.xwork2.config.entities.ActionConfig;
 import com.opensymphony.xwork2.config.entities.Parameterizable;
 import com.opensymphony.xwork2.inject.Inject;
 import com.opensymphony.xwork2.util.ClearableValueStack;
-import com.opensymphony.xwork2.LocalizedTextProvider;
 import com.opensymphony.xwork2.util.TextParseUtil;
 import com.opensymphony.xwork2.util.ValueStack;
 import com.opensymphony.xwork2.util.ValueStackFactory;
@@ -34,6 +34,7 @@ import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.apache.struts2.StrutsConstants;
 import org.apache.struts2.dispatcher.HttpParameters;
+import org.apache.struts2.interceptor.ValidationAware;
 
 import java.util.Collections;
 import java.util.Map;
diff --git a/core/src/main/java/com/opensymphony/xwork2/util/StrutsLocalizedTextProvider.java b/core/src/main/java/com/opensymphony/xwork2/util/StrutsLocalizedTextProvider.java
index 48acc4274..60ef3477a 100644
--- a/core/src/main/java/com/opensymphony/xwork2/util/StrutsLocalizedTextProvider.java
+++ b/core/src/main/java/com/opensymphony/xwork2/util/StrutsLocalizedTextProvider.java
@@ -20,11 +20,11 @@ package com.opensymphony.xwork2.util;
 
 import com.opensymphony.xwork2.ActionContext;
 import com.opensymphony.xwork2.ActionInvocation;
-import com.opensymphony.xwork2.ModelDriven;
 import com.opensymphony.xwork2.conversion.impl.XWorkConverter;
 import com.opensymphony.xwork2.util.reflection.ReflectionProviderFactory;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.apache.struts2.ModelDriven;
 
 import java.beans.PropertyDescriptor;
 import java.util.Locale;
@@ -135,7 +135,7 @@ public class StrutsLocalizedTextProvider extends AbstractLocalizedTextProvider {
      * object.  If so, repeat the entire process from the beginning with the object's class as
      * aClass and "address.state" as the message key.</li>
      * <li>If not found, look for the message in aClass' package hierarchy.</li>
-     * <li>If still not found, look for the message in the default resource bundles 
+     * <li>If still not found, look for the message in the default resource bundles
      * (Note: the lookup is not repeated again if {@link #searchDefaultBundlesFirst} was <code>true</code>).</li>
      * <li>Return defaultMessage</li>
      * </ol>
@@ -190,7 +190,7 @@ public class StrutsLocalizedTextProvider extends AbstractLocalizedTextProvider {
      * object.  If so, repeat the entire process from the beginning with the object's class as
      * aClass and "address.state" as the message key.</li>
      * <li>If not found, look for the message in aClass' package hierarchy.</li>
-     * <li>If still not found, look for the message in the default resource bundles 
+     * <li>If still not found, look for the message in the default resource bundles
      * (Note: the lookup is not repeated again if {@link #searchDefaultBundlesFirst} was <code>true</code>).</li>
      * <li>Return defaultMessage</li>
      * </ol>
diff --git a/core/src/main/java/com/opensymphony/xwork2/validator/ValidationInterceptor.java b/core/src/main/java/com/opensymphony/xwork2/validator/ValidationInterceptor.java
index b0852ed03..cc22250e3 100644
--- a/core/src/main/java/com/opensymphony/xwork2/validator/ValidationInterceptor.java
+++ b/core/src/main/java/com/opensymphony/xwork2/validator/ValidationInterceptor.java
@@ -20,13 +20,13 @@ package com.opensymphony.xwork2.validator;
 
 import com.opensymphony.xwork2.ActionInvocation;
 import com.opensymphony.xwork2.ActionProxy;
-import com.opensymphony.xwork2.Validateable;
 import com.opensymphony.xwork2.inject.Inject;
 import com.opensymphony.xwork2.interceptor.MethodFilterInterceptor;
 import com.opensymphony.xwork2.interceptor.PrefixMethodInvocationUtil;
 import com.opensymphony.xwork2.interceptor.ValidationAware;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.apache.struts2.Validateable;
 
 /**
  * <!-- START SNIPPET: description -->
@@ -71,9 +71,9 @@ import org.apache.logging.log4j.Logger;
  * <li>programmatic - Defaults to true. If true and the action is Validateable call validate(),
  * and any method that starts with "validate".
  * </li>
- * 
+ *
  * <li>declarative - Defaults to true. Perform validation based on xml or annotations.</li>
- * 
+ *
  * </ul>
  *
  * <!-- END SNIPPET: parameters -->
@@ -90,14 +90,14 @@ import org.apache.logging.log4j.Logger;
  *
  * <pre>
  * <!-- START SNIPPET: example -->
- * 
+ *
  * &lt;action name=&quot;someAction&quot; class=&quot;com.examples.SomeAction&quot;&gt;
  *     &lt;interceptor-ref name=&quot;params&quot;/&gt;
  *     &lt;interceptor-ref name=&quot;validation&quot;/&gt;
  *     &lt;interceptor-ref name=&quot;workflow&quot;/&gt;
  *     &lt;result name=&quot;success&quot;&gt;good_result.ftl&lt;/result&gt;
  * &lt;/action&gt;
- * 
+ *
  * &lt;-- in the following case myMethod of the action class will not
  *        get validated --&gt;
  * &lt;action name=&quot;someAction&quot; class=&quot;com.examples.SomeAction&quot;&gt;
@@ -108,7 +108,7 @@ import org.apache.logging.log4j.Logger;
  *     &lt;interceptor-ref name=&quot;workflow&quot;/&gt;
  *     &lt;result name=&quot;success&quot;&gt;good_result.ftl&lt;/result&gt;
  * &lt;/action&gt;
- * 
+ *
  * &lt;-- in the following case only annotated methods of the action class will
  *        be validated --&gt;
  * &lt;action name=&quot;someAction&quot; class=&quot;com.examples.SomeAction&quot;&gt;
@@ -138,9 +138,9 @@ public class ValidationInterceptor extends MethodFilterInterceptor {
     private final static String ALT_VALIDATE_PREFIX = "validateDo";
 
     private boolean validateAnnotatedMethodOnly;
-    
+
     private ActionValidatorManager actionValidatorManager;
-    
+
     private boolean alwaysInvokeValidate = true;
     private boolean programmatic = true;
     private boolean declarative = true;
@@ -149,11 +149,11 @@ public class ValidationInterceptor extends MethodFilterInterceptor {
     public void setActionValidatorManager(ActionValidatorManager mgr) {
         this.actionValidatorManager = mgr;
     }
-    
+
     /**
      * Determines if {@link Validateable}'s <code>validate()</code> should be called,
      * as well as methods whose name that start with "validate". Defaults to "true".
-     * 
+     *
      * @param programmatic <tt>true</tt> then <code>validate()</code> is invoked.
      */
     public void setProgrammatic(boolean programmatic) {
@@ -161,9 +161,9 @@ public class ValidationInterceptor extends MethodFilterInterceptor {
     }
 
     /**
-     * Determines if validation based on annotations or xml should be performed. Defaults 
+     * Determines if validation based on annotations or xml should be performed. Defaults
      * to "true".
-     * 
+     *
      * @param declarative <tt>true</tt> then perform validation based on annotations or xml.
      */
     public void setDeclarative(boolean declarative) {
@@ -171,9 +171,9 @@ public class ValidationInterceptor extends MethodFilterInterceptor {
     }
 
     /**
-     * Determines if {@link Validateable}'s <code>validate()</code> should always 
+     * Determines if {@link Validateable}'s <code>validate()</code> should always
      * be invoked. Default to "true".
-     * 
+     *
      * @param alwaysInvokeValidate <tt>true</tt> then <code>validate()</code> is always invoked.
      */
     public void setAlwaysInvokeValidate(String alwaysInvokeValidate) {
@@ -218,7 +218,7 @@ public class ValidationInterceptor extends MethodFilterInterceptor {
         if (LOG.isDebugEnabled()) {
             LOG.debug("Validating {}/{} with method {}.", invocation.getProxy().getNamespace(), invocation.getProxy().getActionName(), method);
         }
-        
+
 
         if (declarative) {
            if (validateAnnotatedMethodOnly) {
@@ -226,12 +226,12 @@ public class ValidationInterceptor extends MethodFilterInterceptor {
            } else {
                actionValidatorManager.validate(action, context);
            }
-       }    
-        
+       }
+
         if (action instanceof Validateable && programmatic) {
             // keep exception that might occured in validateXXX or validateDoXXX
-            Exception exception = null; 
-            
+            Exception exception = null;
+
             Validateable validateable = (Validateable) action;
             LOG.debug("Invoking validate() on action {}", validateable);
 
@@ -239,19 +239,19 @@ public class ValidationInterceptor extends MethodFilterInterceptor {
                 PrefixMethodInvocationUtil.invokePrefixMethod(invocation, new String[]{VALIDATE_PREFIX, ALT_VALIDATE_PREFIX});
             }
             catch(Exception e) {
-                // If any exception occurred while doing reflection, we want 
+                // If any exception occurred while doing reflection, we want
                 // validate() to be executed
                 LOG.warn("an exception occured while executing the prefix method", e);
                 exception = e;
             }
-            
-            
+
+
             if (alwaysInvokeValidate) {
                 validateable.validate();
             }
-            
-            if (exception != null) { 
-                // rethrow if something is wrong while doing validateXXX / validateDoXXX 
+
+            if (exception != null) {
+                // rethrow if something is wrong while doing validateXXX / validateDoXXX
                 throw exception;
             }
         }
@@ -262,7 +262,7 @@ public class ValidationInterceptor extends MethodFilterInterceptor {
         doBeforeInvocation(invocation);
         return invocation.invoke();
     }
-    
+
     /**
      * <p>
      * Returns the context that will be used by the
diff --git a/core/src/main/java/org/apache/struts2/interceptor/AbstractFileUploadInterceptor.java b/core/src/main/java/org/apache/struts2/interceptor/AbstractFileUploadInterceptor.java
index 1113f4491..ecebd3748 100644
--- a/core/src/main/java/org/apache/struts2/interceptor/AbstractFileUploadInterceptor.java
+++ b/core/src/main/java/org/apache/struts2/interceptor/AbstractFileUploadInterceptor.java
@@ -25,7 +25,6 @@ import com.opensymphony.xwork2.TextProviderFactory;
 import com.opensymphony.xwork2.inject.Container;
 import com.opensymphony.xwork2.inject.Inject;
 import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
-import com.opensymphony.xwork2.interceptor.ValidationAware;
 import com.opensymphony.xwork2.util.TextParseUtil;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
diff --git a/core/src/main/java/org/apache/struts2/interceptor/ActionFileUploadInterceptor.java b/core/src/main/java/org/apache/struts2/interceptor/ActionFileUploadInterceptor.java
index c42d125af..681a8ab92 100644
--- a/core/src/main/java/org/apache/struts2/interceptor/ActionFileUploadInterceptor.java
+++ b/core/src/main/java/org/apache/struts2/interceptor/ActionFileUploadInterceptor.java
@@ -20,7 +20,6 @@ package org.apache.struts2.interceptor;
 
 import com.opensymphony.xwork2.ActionInvocation;
 import com.opensymphony.xwork2.ActionProxy;
-import com.opensymphony.xwork2.interceptor.ValidationAware;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.apache.struts2.action.UploadedFilesAware;
diff --git a/core/src/main/java/org/apache/struts2/interceptor/MessageStoreInterceptor.java b/core/src/main/java/org/apache/struts2/interceptor/MessageStoreInterceptor.java
index 1596be589..1d1522828 100644
--- a/core/src/main/java/org/apache/struts2/interceptor/MessageStoreInterceptor.java
+++ b/core/src/main/java/org/apache/struts2/interceptor/MessageStoreInterceptor.java
@@ -18,14 +18,11 @@
  */
 package org.apache.struts2.interceptor;
 
-import com.opensymphony.xwork2.ActionContext;
 import com.opensymphony.xwork2.ActionInvocation;
-import com.opensymphony.xwork2.interceptor.ValidationAware;
 import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.apache.struts2.dispatcher.HttpParameters;
-
 import org.apache.struts2.result.ServletRedirectResult;
 
 import java.util.ArrayList;
@@ -58,7 +55,7 @@ import java.util.Map;
  *
  * <p>
  * In the 'AUTOMATIC' mode, the interceptor will always retrieve the stored action's message / errors
- * and field errors and put them back into the {@link ValidationAware} action, and after Action execution, 
+ * and field errors and put them back into the {@link ValidationAware} action, and after Action execution,
  * if the {@link com.opensymphony.xwork2.Result} is an instance of {@link ServletRedirectResult}, the action's message / errors
  * and field errors into automatically be stored in the HTTP session..
  * </p>
diff --git a/core/src/main/java/org/apache/struts2/interceptor/MessageStorePreResultListener.java b/core/src/main/java/org/apache/struts2/interceptor/MessageStorePreResultListener.java
index bf40e148b..6c6dc8041 100644
--- a/core/src/main/java/org/apache/struts2/interceptor/MessageStorePreResultListener.java
+++ b/core/src/main/java/org/apache/struts2/interceptor/MessageStorePreResultListener.java
@@ -21,7 +21,6 @@ package org.apache.struts2.interceptor;
 import com.opensymphony.xwork2.ActionInvocation;
 import com.opensymphony.xwork2.config.entities.ResultConfig;
 import com.opensymphony.xwork2.interceptor.PreResultListener;
-import com.opensymphony.xwork2.interceptor.ValidationAware;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.apache.struts2.ServletActionContext;
diff --git a/plugins/bean-validation/src/main/java/org/apache/struts/beanvalidation/validation/interceptor/BeanValidationInterceptor.java b/plugins/bean-validation/src/main/java/org/apache/struts/beanvalidation/validation/interceptor/BeanValidationInterceptor.java
index 75c25f9c3..e36e3c63c 100644
--- a/plugins/bean-validation/src/main/java/org/apache/struts/beanvalidation/validation/interceptor/BeanValidationInterceptor.java
+++ b/plugins/bean-validation/src/main/java/org/apache/struts/beanvalidation/validation/interceptor/BeanValidationInterceptor.java
@@ -20,7 +20,6 @@ package org.apache.struts.beanvalidation.validation.interceptor;
 
 import com.opensymphony.xwork2.ActionInvocation;
 import com.opensymphony.xwork2.ActionProxy;
-import com.opensymphony.xwork2.ModelDriven;
 import com.opensymphony.xwork2.TextProviderFactory;
 import com.opensymphony.xwork2.inject.Inject;
 import com.opensymphony.xwork2.interceptor.MethodFilterInterceptor;
@@ -33,6 +32,7 @@ import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.apache.struts.beanvalidation.constraints.ValidationGroup;
 import org.apache.struts.beanvalidation.validation.constant.ValidatorConstants;
+import org.apache.struts2.ModelDriven;
 import org.apache.struts2.interceptor.validation.SkipValidation;
 
 import javax.validation.ConstraintViolation;
diff --git a/plugins/dwr/src/main/java/org/apache/struts2/validators/DWRValidator.java b/plugins/dwr/src/main/java/org/apache/struts2/validators/DWRValidator.java
index f189cd182..46c2953b5 100644
--- a/plugins/dwr/src/main/java/org/apache/struts2/validators/DWRValidator.java
+++ b/plugins/dwr/src/main/java/org/apache/struts2/validators/DWRValidator.java
@@ -24,7 +24,6 @@ import com.opensymphony.xwork2.ActionProxyFactory;
 import com.opensymphony.xwork2.DefaultActionInvocation;
 import com.opensymphony.xwork2.ValidationAwareSupport;
 import com.opensymphony.xwork2.config.entities.ActionConfig;
-import com.opensymphony.xwork2.interceptor.ValidationAware;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.apache.struts2.dispatcher.ApplicationMap;
@@ -32,6 +31,7 @@ import org.apache.struts2.dispatcher.Dispatcher;
 import org.apache.struts2.dispatcher.HttpParameters;
 import org.apache.struts2.dispatcher.RequestMap;
 import org.apache.struts2.dispatcher.SessionMap;
+import org.apache.struts2.interceptor.ValidationAware;
 import org.directwebremoting.WebContextFactory;
 
 import javax.servlet.ServletContext;
diff --git a/plugins/json/src/main/java/org/apache/struts2/json/JSONResult.java b/plugins/json/src/main/java/org/apache/struts2/json/JSONResult.java
index 2161ef0c1..6d9a8d026 100644
--- a/plugins/json/src/main/java/org/apache/struts2/json/JSONResult.java
+++ b/plugins/json/src/main/java/org/apache/struts2/json/JSONResult.java
@@ -20,7 +20,6 @@ package org.apache.struts2.json;
 
 import com.opensymphony.xwork2.ActionContext;
 import com.opensymphony.xwork2.ActionInvocation;
-import com.opensymphony.xwork2.ModelDriven;
 import com.opensymphony.xwork2.Result;
 import com.opensymphony.xwork2.inject.Inject;
 import com.opensymphony.xwork2.util.ValueStack;
@@ -29,6 +28,7 @@ import org.apache.commons.lang3.BooleanUtils;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.apache.struts2.ModelDriven;
 import org.apache.struts2.StrutsConstants;
 import org.apache.struts2.json.smd.SMDGenerator;
 
diff --git a/plugins/json/src/main/java/org/apache/struts2/json/JSONValidationInterceptor.java b/plugins/json/src/main/java/org/apache/struts2/json/JSONValidationInterceptor.java
index 4e5938904..354780b38 100644
--- a/plugins/json/src/main/java/org/apache/struts2/json/JSONValidationInterceptor.java
+++ b/plugins/json/src/main/java/org/apache/struts2/json/JSONValidationInterceptor.java
@@ -20,13 +20,13 @@ package org.apache.struts2.json;
 
 import com.opensymphony.xwork2.Action;
 import com.opensymphony.xwork2.ActionInvocation;
-import com.opensymphony.xwork2.ModelDriven;
-import com.opensymphony.xwork2.interceptor.ValidationAware;
 import com.opensymphony.xwork2.interceptor.MethodFilterInterceptor;
-import org.apache.logging.log4j.Logger;
-import org.apache.logging.log4j.LogManager;
 import org.apache.commons.text.StringEscapeUtils;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+import org.apache.struts2.ModelDriven;
 import org.apache.struts2.ServletActionContext;
+import org.apache.struts2.interceptor.ValidationAware;
 
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
diff --git a/plugins/oval/src/main/java/org/apache/struts2/oval/interceptor/OValValidationInterceptor.java b/plugins/oval/src/main/java/org/apache/struts2/oval/interceptor/OValValidationInterceptor.java
index 0bb2bba88..0350c027d 100644
--- a/plugins/oval/src/main/java/org/apache/struts2/oval/interceptor/OValValidationInterceptor.java
+++ b/plugins/oval/src/main/java/org/apache/struts2/oval/interceptor/OValValidationInterceptor.java
@@ -21,9 +21,7 @@ package org.apache.struts2.oval.interceptor;
 import com.opensymphony.xwork2.ActionContext;
 import com.opensymphony.xwork2.ActionInvocation;
 import com.opensymphony.xwork2.ActionProxy;
-import com.opensymphony.xwork2.ModelDriven;
 import com.opensymphony.xwork2.TextProviderFactory;
-import com.opensymphony.xwork2.Validateable;
 import com.opensymphony.xwork2.inject.Inject;
 import com.opensymphony.xwork2.interceptor.MethodFilterInterceptor;
 import com.opensymphony.xwork2.interceptor.PrefixMethodInvocationUtil;
@@ -48,6 +46,7 @@ import ognl.OgnlException;
 import org.apache.commons.lang3.StringUtils;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.apache.struts2.Validateable;
 import org.apache.struts2.oval.annotation.Profiles;
 
 import java.lang.reflect.Field;
diff --git a/plugins/rest/src/main/java/org/apache/struts2/rest/ContentTypeInterceptor.java b/plugins/rest/src/main/java/org/apache/struts2/rest/ContentTypeInterceptor.java
index 03d299c86..01a28e6c5 100644
--- a/plugins/rest/src/main/java/org/apache/struts2/rest/ContentTypeInterceptor.java
+++ b/plugins/rest/src/main/java/org/apache/struts2/rest/ContentTypeInterceptor.java
@@ -19,9 +19,9 @@
 package org.apache.struts2.rest;
 
 import com.opensymphony.xwork2.ActionInvocation;
-import com.opensymphony.xwork2.ModelDriven;
 import com.opensymphony.xwork2.inject.Inject;
 import com.opensymphony.xwork2.interceptor.AbstractInterceptor;
+import org.apache.struts2.ModelDriven;
 import org.apache.struts2.ServletActionContext;
 import org.apache.struts2.rest.handler.ContentTypeHandler;
 
diff --git a/plugins/rest/src/main/java/org/apache/struts2/rest/RestActionInvocation.java b/plugins/rest/src/main/java/org/apache/struts2/rest/RestActionInvocation.java
index 286c80db1..076f94d87 100644
--- a/plugins/rest/src/main/java/org/apache/struts2/rest/RestActionInvocation.java
+++ b/plugins/rest/src/main/java/org/apache/struts2/rest/RestActionInvocation.java
@@ -18,19 +18,23 @@
  */
 package org.apache.struts2.rest;
 
-import com.opensymphony.xwork2.*;
+import com.opensymphony.xwork2.Action;
+import com.opensymphony.xwork2.ActionInvocation;
+import com.opensymphony.xwork2.DefaultActionInvocation;
+import com.opensymphony.xwork2.Result;
 import com.opensymphony.xwork2.config.ConfigurationException;
 import com.opensymphony.xwork2.config.entities.ActionConfig;
 import com.opensymphony.xwork2.config.entities.ResultConfig;
 import com.opensymphony.xwork2.inject.Inject;
-import com.opensymphony.xwork2.interceptor.ValidationAware;
 import org.apache.commons.lang3.BooleanUtils;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.apache.struts2.ModelDriven;
 import org.apache.struts2.ServletActionContext;
-import org.apache.struts2.result.HttpHeaderResult;
+import org.apache.struts2.interceptor.ValidationAware;
 import org.apache.struts2.rest.handler.ContentTypeHandler;
 import org.apache.struts2.rest.handler.HtmlHandler;
+import org.apache.struts2.result.HttpHeaderResult;
 
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
@@ -74,7 +78,7 @@ public class RestActionInvocation extends DefaultActionInvocation {
     /**
      * If set to true (by default) blocks returning content from any other methods than GET,
      * if set to false, the content can be returned for any kind of method
-     * 
+     *
      * @param restrictToGet true or false
      */
     @Inject(value = RestConstants.REST_CONTENT_RESTRICT_TO_GET, required = false)
diff --git a/plugins/rest/src/main/java/org/apache/struts2/rest/RestWorkflowInterceptor.java b/plugins/rest/src/main/java/org/apache/struts2/rest/RestWorkflowInterceptor.java
index 6a981c8e5..3bfbe779c 100644
--- a/plugins/rest/src/main/java/org/apache/struts2/rest/RestWorkflowInterceptor.java
+++ b/plugins/rest/src/main/java/org/apache/struts2/rest/RestWorkflowInterceptor.java
@@ -23,10 +23,10 @@ import com.opensymphony.xwork2.ActionContext;
 import com.opensymphony.xwork2.ActionInvocation;
 import com.opensymphony.xwork2.inject.Inject;
 import com.opensymphony.xwork2.interceptor.MethodFilterInterceptor;
-import com.opensymphony.xwork2.interceptor.ValidationAware;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.apache.struts2.dispatcher.mapper.ActionMapping;
+import org.apache.struts2.interceptor.ValidationAware;
 
 import java.util.HashMap;
 import java.util.Map;
diff --git a/plugins/rest/src/main/java/org/apache/struts2/rest/handler/XStreamHandler.java b/plugins/rest/src/main/java/org/apache/struts2/rest/handler/XStreamHandler.java
index 13831093f..b482c0715 100644
--- a/plugins/rest/src/main/java/org/apache/struts2/rest/handler/XStreamHandler.java
+++ b/plugins/rest/src/main/java/org/apache/struts2/rest/handler/XStreamHandler.java
@@ -19,7 +19,6 @@
 package org.apache.struts2.rest.handler;
 
 import com.opensymphony.xwork2.ActionInvocation;
-import com.opensymphony.xwork2.ModelDriven;
 import com.thoughtworks.xstream.XStream;
 import com.thoughtworks.xstream.io.xml.StaxDriver;
 import com.thoughtworks.xstream.security.ArrayTypePermission;
@@ -29,6 +28,7 @@ import com.thoughtworks.xstream.security.PrimitiveTypePermission;
 import com.thoughtworks.xstream.security.TypePermission;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import org.apache.struts2.ModelDriven;
 import org.apache.struts2.rest.handler.xstream.XStreamAllowedClassNames;
 import org.apache.struts2.rest.handler.xstream.XStreamAllowedClasses;
 import org.apache.struts2.rest.handler.xstream.XStreamPermissionProvider;