diff --git a/modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/ApiClient.mustache b/modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/ApiClient.mustache
index d44d724454eb..759e6708aa19 100644
--- a/modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/ApiClient.mustache
+++ b/modules/swagger-codegen/src/main/resources/Java/libraries/jersey2/ApiClient.mustache
@@ -25,6 +25,7 @@ import java.io.InputStream;
 
 {{^supportJava6}}
 import java.nio.file.Files;
+import java.nio.file.StandardCopyOption;
 {{/supportJava6}}
 {{#supportJava6}}
 import org.apache.commons.io.FileUtils;
@@ -581,7 +582,7 @@ public class ApiClient {
     try {
       File file = prepareDownloadFile(response);
 {{^supportJava6}}
-      Files.copy(response.readEntity(InputStream.class), file.toPath());
+      Files.copy(response.readEntity(InputStream.class), file.toPath(), StandardCopyOption.REPLACE_EXISTING);
 {{/supportJava6}}
 {{#supportJava6}}
       // Java6 falls back to commons.io for file copying
diff --git a/samples/client/petstore/java/jersey2-java6/.swagger-codegen/VERSION b/samples/client/petstore/java/jersey2-java6/.swagger-codegen/VERSION
new file mode 100644
index 000000000000..7fea99011a6f
--- /dev/null
+++ b/samples/client/petstore/java/jersey2-java6/.swagger-codegen/VERSION
@@ -0,0 +1 @@
+2.2.3-SNAPSHOT
\ No newline at end of file
diff --git a/samples/client/petstore/java/jersey2-java6/src/main/java/io/swagger/client/model/OuterComposite.java b/samples/client/petstore/java/jersey2-java6/src/main/java/io/swagger/client/model/OuterComposite.java
index 51d9a3c47ef8..0b80c71974a8 100644
--- a/samples/client/petstore/java/jersey2-java6/src/main/java/io/swagger/client/model/OuterComposite.java
+++ b/samples/client/petstore/java/jersey2-java6/src/main/java/io/swagger/client/model/OuterComposite.java
@@ -16,6 +16,7 @@ package io.swagger.client.model;
 import org.apache.commons.lang3.ObjectUtils;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
 import java.math.BigDecimal;
diff --git a/samples/client/petstore/java/jersey2/.swagger-codegen/VERSION b/samples/client/petstore/java/jersey2/.swagger-codegen/VERSION
new file mode 100644
index 000000000000..7fea99011a6f
--- /dev/null
+++ b/samples/client/petstore/java/jersey2/.swagger-codegen/VERSION
@@ -0,0 +1 @@
+2.2.3-SNAPSHOT
\ No newline at end of file
diff --git a/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/ApiClient.java b/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/ApiClient.java
index 2878363c9803..d3e9924e8eb6 100644
--- a/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/ApiClient.java
+++ b/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/ApiClient.java
@@ -24,6 +24,7 @@ import java.io.IOException;
 import java.io.InputStream;
 
 import java.nio.file.Files;
+import java.nio.file.StandardCopyOption;
 import java.util.Collection;
 import java.util.Collections;
 import java.util.Map;
@@ -575,7 +576,7 @@ public class ApiClient {
   public File downloadFileFromResponse(Response response) throws ApiException {
     try {
       File file = prepareDownloadFile(response);
-      Files.copy(response.readEntity(InputStream.class), file.toPath());
+      Files.copy(response.readEntity(InputStream.class), file.toPath(), StandardCopyOption.REPLACE_EXISTING);
       return file;
     } catch (IOException e) {
       throw new ApiException(e);
diff --git a/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/model/OuterComposite.java b/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/model/OuterComposite.java
index 65d370c72f2f..7b1786ea96d8 100644
--- a/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/model/OuterComposite.java
+++ b/samples/client/petstore/java/jersey2/src/main/java/io/swagger/client/model/OuterComposite.java
@@ -16,6 +16,7 @@ package io.swagger.client.model;
 import java.util.Objects;
 import com.fasterxml.jackson.annotation.JsonProperty;
 import com.fasterxml.jackson.annotation.JsonCreator;
+import com.fasterxml.jackson.annotation.JsonValue;
 import io.swagger.annotations.ApiModel;
 import io.swagger.annotations.ApiModelProperty;
 import java.math.BigDecimal;