docs: generate sample code in the Java microgenerator

google-cloud-dataproc/src/main/java/com/google/cloud/dataproc/v1/package-info.java

@@ -23,24 +23,62 @@
  *
  * <p>Sample for AutoscalingPolicyServiceClient:
  *
+ * <pre>{@code
+ * try (AutoscalingPolicyServiceClient autoscalingPolicyServiceClient =
+ *     AutoscalingPolicyServiceClient.create()) {
+ *   LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
+ *   AutoscalingPolicy policy = AutoscalingPolicy.newBuilder().build();
+ *   AutoscalingPolicy response =
+ *       autoscalingPolicyServiceClient.createAutoscalingPolicy(parent, policy);
+ * }
+ * }</pre>
+ *
  * <p>======================= ClusterControllerClient =======================
  *
  * <p>Service Description: The ClusterControllerService provides methods to manage clusters of
  * Compute Engine instances.
  *
  * <p>Sample for ClusterControllerClient:
  *
+ * <pre>{@code
+ * try (ClusterControllerClient clusterControllerClient = ClusterControllerClient.create()) {
+ *   String projectId = "projectId-894832108";
+ *   String region = "region-934795532";
+ *   String clusterName = "clusterName-1141738587";
+ *   Cluster response = clusterControllerClient.getCluster(projectId, region, clusterName);
+ * }
+ * }</pre>
+ *
  * <p>======================= JobControllerClient =======================
  *
  * <p>Service Description: The JobController provides methods to manage jobs.
  *
  * <p>Sample for JobControllerClient:
  *
+ * <pre>{@code
+ * try (JobControllerClient jobControllerClient = JobControllerClient.create()) {
+ *   String projectId = "projectId-894832108";
+ *   String region = "region-934795532";
+ *   Job job = Job.newBuilder().build();
+ *   Job response = jobControllerClient.submitJob(projectId, region, job);
+ * }
+ * }</pre>
+ *
  * <p>======================= WorkflowTemplateServiceClient =======================
  *
  * <p>Service Description: The API interface for managing Workflow Templates in the Dataproc API.
  *
  * <p>Sample for WorkflowTemplateServiceClient:
+ *
+ * <pre>{@code
+ * try (WorkflowTemplateServiceClient workflowTemplateServiceClient =
+ *     WorkflowTemplateServiceClient.create()) {
+ *   LocationName parent = LocationName.of("[PROJECT]", "[LOCATION]");
+ *   WorkflowTemplate template = WorkflowTemplate.newBuilder().build();
+ *   WorkflowTemplate response =
+ *       workflowTemplateServiceClient.createWorkflowTemplate(parent, template);
+ * }
+ * }</pre>
  */
 @Generated("by gapic-generator-java")
 package com.google.cloud.dataproc.v1;