add travis.yml for java client

modules/swagger-codegen/src/main/java/io/swagger/codegen/languages/JavaClientCodegen.java

@@ -262,6 +262,7 @@ public class JavaClientCodegen extends DefaultCodegen implements CodegenConfig {
         writeOptional(outputFolder, new SupportingFile("settings.gradle.mustache", "", "settings.gradle"));
         writeOptional(outputFolder, new SupportingFile("gradle.properties.mustache", "", "gradle.properties"));
         writeOptional(outputFolder, new SupportingFile("manifest.mustache", projectFolder, "AndroidManifest.xml"));
+        supportingFiles.add(new SupportingFile("travis.mustache", "", ".travis.yml"));
         supportingFiles.add(new SupportingFile("ApiClient.mustache", invokerFolder, "ApiClient.java"));
         supportingFiles.add(new SupportingFile("StringUtil.mustache", invokerFolder, "StringUtil.java"));
 

modules/swagger-codegen/src/main/resources/Java/gitignore.mustache

@@ -13,3 +13,9 @@
 
 # virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
 hs_err_pid*
+
+# build files
+**/target
+target
+.gradle
+build

modules/swagger-codegen/src/main/resources/Java/travis.mustache

@@ -0,0 +1,29 @@
+#
+# Generated by: https://github.com/swagger-api/swagger-codegen.git
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+language: java
+jdk:
+  - oraclejdk8
+  - oraclejdk7
+before_install:
+  # ensure gradlew has proper permission
+  - chmod a+x ./gradlew
+script:
+  # test using maven
+  - mvn test
+  # uncomment below to test using gradle
+  # - gradle test
+  # uncomment below to test using sbt 
+  # - sbt test