diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/auth/OAuth.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/auth/OAuth.mustache
index 62b573a66c0..30060cc2701 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/auth/OAuth.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/auth/OAuth.mustache
@@ -26,7 +26,7 @@ public class OAuth implements Authentication {
 
     private String tokenUrl;
     private String absoluteTokenUrl;
-    private OAuthFlow flow = OAuthFlow.application;
+    private OAuthFlow flow = OAuthFlow.APPLICATION;
     private OAuth20Service service;
     private DefaultApi20 authApi;
     private String scope;
@@ -103,18 +103,18 @@ public class OAuth implements Authentication {
         }
         try {
             switch (flow) {
-                case password:
+                case PASSWORD:
                     if (username != null && password != null) {
                         accessToken = service.getAccessTokenPasswordGrant(username, password, scope);
                     }
                     break;
-                case accessCode:
+                case ACCESS_CODE:
                     if (code != null) {
                         accessToken = service.getAccessToken(code);
                         code = null;
                     }
                     break;
-                case application:
+                case APPLICATION:
                     accessToken = service.getAccessTokenClientCredentialsGrant(scope);
                     break;
                 default:
@@ -159,14 +159,14 @@ public class OAuth implements Authentication {
     }
 
     public OAuth usePasswordFlow(String username, String password) {
-        this.flow = OAuthFlow.password;
+        this.flow = OAuthFlow.PASSWORD;
         this.username = username;
         this.password = password;
         return this;
     }
 
     public OAuth useAuthorizationCodeFlow(String code) {
-        this.flow = OAuthFlow.accessCode;
+        this.flow = OAuthFlow.ACCESS_CODE;
         this.code = code;
         return this;
     }
diff --git a/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/auth/OAuthFlow.mustache b/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/auth/OAuthFlow.mustache
index 002e9572f33..190781fb126 100644
--- a/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/auth/OAuthFlow.mustache
+++ b/modules/openapi-generator/src/main/resources/Java/libraries/jersey2/auth/OAuthFlow.mustache
@@ -2,6 +2,12 @@
 
 package {{invokerPackage}}.auth;
 
+/**
+ * OAuth flows that are supported by this client
+ */
 public enum OAuthFlow {
-    accessCode, implicit, password, application
+    ACCESS_CODE,
+    IMPLICIT,
+    PASSWORD,
+    APPLICATION
 }
diff --git a/samples/client/petstore/java/jersey2-java8-localdatetime/src/main/java/org/openapitools/client/auth/OAuth.java b/samples/client/petstore/java/jersey2-java8-localdatetime/src/main/java/org/openapitools/client/auth/OAuth.java
index 8a468063c98..005911308d9 100644
--- a/samples/client/petstore/java/jersey2-java8-localdatetime/src/main/java/org/openapitools/client/auth/OAuth.java
+++ b/samples/client/petstore/java/jersey2-java8-localdatetime/src/main/java/org/openapitools/client/auth/OAuth.java
@@ -37,7 +37,7 @@ public class OAuth implements Authentication {
 
     private String tokenUrl;
     private String absoluteTokenUrl;
-    private OAuthFlow flow = OAuthFlow.application;
+    private OAuthFlow flow = OAuthFlow.APPLICATION;
     private OAuth20Service service;
     private DefaultApi20 authApi;
     private String scope;
@@ -114,18 +114,18 @@ public class OAuth implements Authentication {
         }
         try {
             switch (flow) {
-                case password:
+                case PASSWORD:
                     if (username != null && password != null) {
                         accessToken = service.getAccessTokenPasswordGrant(username, password, scope);
                     }
                     break;
-                case accessCode:
+                case ACCESS_CODE:
                     if (code != null) {
                         accessToken = service.getAccessToken(code);
                         code = null;
                     }
                     break;
-                case application:
+                case APPLICATION:
                     accessToken = service.getAccessTokenClientCredentialsGrant(scope);
                     break;
                 default:
@@ -170,14 +170,14 @@ public class OAuth implements Authentication {
     }
 
     public OAuth usePasswordFlow(String username, String password) {
-        this.flow = OAuthFlow.password;
+        this.flow = OAuthFlow.PASSWORD;
         this.username = username;
         this.password = password;
         return this;
     }
 
     public OAuth useAuthorizationCodeFlow(String code) {
-        this.flow = OAuthFlow.accessCode;
+        this.flow = OAuthFlow.ACCESS_CODE;
         this.code = code;
         return this;
     }
diff --git a/samples/client/petstore/java/jersey2-java8-localdatetime/src/main/java/org/openapitools/client/auth/OAuthFlow.java b/samples/client/petstore/java/jersey2-java8-localdatetime/src/main/java/org/openapitools/client/auth/OAuthFlow.java
index b2d11ff0c4f..dab6bf989ea 100644
--- a/samples/client/petstore/java/jersey2-java8-localdatetime/src/main/java/org/openapitools/client/auth/OAuthFlow.java
+++ b/samples/client/petstore/java/jersey2-java8-localdatetime/src/main/java/org/openapitools/client/auth/OAuthFlow.java
@@ -13,6 +13,12 @@
 
 package org.openapitools.client.auth;
 
+/**
+ * OAuth flows that are supported by this client
+ */
 public enum OAuthFlow {
-    accessCode, implicit, password, application
+    ACCESS_CODE,
+    IMPLICIT,
+    PASSWORD,
+    APPLICATION
 }
diff --git a/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/OAuth.java b/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/OAuth.java
index 8a468063c98..005911308d9 100644
--- a/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/OAuth.java
+++ b/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/OAuth.java
@@ -37,7 +37,7 @@ public class OAuth implements Authentication {
 
     private String tokenUrl;
     private String absoluteTokenUrl;
-    private OAuthFlow flow = OAuthFlow.application;
+    private OAuthFlow flow = OAuthFlow.APPLICATION;
     private OAuth20Service service;
     private DefaultApi20 authApi;
     private String scope;
@@ -114,18 +114,18 @@ public class OAuth implements Authentication {
         }
         try {
             switch (flow) {
-                case password:
+                case PASSWORD:
                     if (username != null && password != null) {
                         accessToken = service.getAccessTokenPasswordGrant(username, password, scope);
                     }
                     break;
-                case accessCode:
+                case ACCESS_CODE:
                     if (code != null) {
                         accessToken = service.getAccessToken(code);
                         code = null;
                     }
                     break;
-                case application:
+                case APPLICATION:
                     accessToken = service.getAccessTokenClientCredentialsGrant(scope);
                     break;
                 default:
@@ -170,14 +170,14 @@ public class OAuth implements Authentication {
     }
 
     public OAuth usePasswordFlow(String username, String password) {
-        this.flow = OAuthFlow.password;
+        this.flow = OAuthFlow.PASSWORD;
         this.username = username;
         this.password = password;
         return this;
     }
 
     public OAuth useAuthorizationCodeFlow(String code) {
-        this.flow = OAuthFlow.accessCode;
+        this.flow = OAuthFlow.ACCESS_CODE;
         this.code = code;
         return this;
     }
diff --git a/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/OAuthFlow.java b/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/OAuthFlow.java
index b2d11ff0c4f..dab6bf989ea 100644
--- a/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/OAuthFlow.java
+++ b/samples/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/OAuthFlow.java
@@ -13,6 +13,12 @@
 
 package org.openapitools.client.auth;
 
+/**
+ * OAuth flows that are supported by this client
+ */
 public enum OAuthFlow {
-    accessCode, implicit, password, application
+    ACCESS_CODE,
+    IMPLICIT,
+    PASSWORD,
+    APPLICATION
 }
diff --git a/samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/OAuth.java b/samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/OAuth.java
index 8a468063c98..005911308d9 100644
--- a/samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/OAuth.java
+++ b/samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/OAuth.java
@@ -37,7 +37,7 @@ public class OAuth implements Authentication {
 
     private String tokenUrl;
     private String absoluteTokenUrl;
-    private OAuthFlow flow = OAuthFlow.application;
+    private OAuthFlow flow = OAuthFlow.APPLICATION;
     private OAuth20Service service;
     private DefaultApi20 authApi;
     private String scope;
@@ -114,18 +114,18 @@ public class OAuth implements Authentication {
         }
         try {
             switch (flow) {
-                case password:
+                case PASSWORD:
                     if (username != null && password != null) {
                         accessToken = service.getAccessTokenPasswordGrant(username, password, scope);
                     }
                     break;
-                case accessCode:
+                case ACCESS_CODE:
                     if (code != null) {
                         accessToken = service.getAccessToken(code);
                         code = null;
                     }
                     break;
-                case application:
+                case APPLICATION:
                     accessToken = service.getAccessTokenClientCredentialsGrant(scope);
                     break;
                 default:
@@ -170,14 +170,14 @@ public class OAuth implements Authentication {
     }
 
     public OAuth usePasswordFlow(String username, String password) {
-        this.flow = OAuthFlow.password;
+        this.flow = OAuthFlow.PASSWORD;
         this.username = username;
         this.password = password;
         return this;
     }
 
     public OAuth useAuthorizationCodeFlow(String code) {
-        this.flow = OAuthFlow.accessCode;
+        this.flow = OAuthFlow.ACCESS_CODE;
         this.code = code;
         return this;
     }
diff --git a/samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/OAuthFlow.java b/samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/OAuthFlow.java
index b2d11ff0c4f..dab6bf989ea 100644
--- a/samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/OAuthFlow.java
+++ b/samples/openapi3/client/petstore/java/jersey2-java8/src/main/java/org/openapitools/client/auth/OAuthFlow.java
@@ -13,6 +13,12 @@
 
 package org.openapitools.client.auth;
 
+/**
+ * OAuth flows that are supported by this client
+ */
 public enum OAuthFlow {
-    accessCode, implicit, password, application
+    ACCESS_CODE,
+    IMPLICIT,
+    PASSWORD,
+    APPLICATION
 }