added bootstrap sample

samples/server/petstore/jersey2/src/main/java/io/swagger/api/Bootstrap.java

@@ -0,0 +1,31 @@
+package io.swagger.api;
+
+import io.swagger.jaxrs.config.SwaggerContextService;
+import io.swagger.models.*;
+
+import io.swagger.models.auth.*;
+
+import javax.servlet.http.HttpServlet;
+import javax.servlet.ServletContext;
+import javax.servlet.ServletConfig;
+import javax.servlet.ServletException;
+
+public class Bootstrap extends HttpServlet {
+  @Override
+  public void init(ServletConfig config) throws ServletException {
+    Info info = new Info()
+      .title("Swagger Server")
+      .description("This is a sample server Petstore server.  You can find out more about\nSwagger at [http://swagger.io](http://swagger.io) or on [irc.freenode.net, #swagger](http://swagger.io/irc/).\nFor this sample, you can use the api key `special-key` to test the authorization filters.\n")
+      .termsOfService("http://swagger.io/terms/")
+      .contact(new Contact()
+        .email("apiteam@swagger.io"))
+      .license(new License()
+        .name("Apache 2.0")
+        .url("http://www.apache.org/licenses/LICENSE-2.0.html"));
+
+    ServletContext context = config.getServletContext();
+    Swagger swagger = new Swagger().info(info);
+
+    new SwaggerContextService().withServletConfig(config).updateSwagger(swagger);
+  }
+}