Add unused-import check.

Author: Jerjou Cheng

bigquery/pom.xml

@@ -41,18 +41,20 @@
       <artifactId>google-oauth-client-jetty</artifactId>
       <version>${project.oauth.version}</version>
     </dependency>
+    <dependency>
+      <groupId>com.google.code.gson</groupId>
+      <artifactId>gson</artifactId>
+      <version>2.3.1</version>
+    </dependency>
     <dependency>
       <groupId>junit</groupId>
       <artifactId>junit</artifactId>
+      <scope>test</scope>
     </dependency>
     <dependency>
       <groupId>com.jcabi</groupId>
       <artifactId>jcabi-matchers</artifactId>
-    </dependency>
-    <dependency>
-      <groupId>com.google.code.gson</groupId>
-      <artifactId>gson</artifactId>
-      <version>2.3.1</version>
+      <scope>test</scope>
     </dependency>
   </dependencies>
 

bigquery/src/main/java/com/google/cloud/bigquery/samples/GettingStarted.java

@@ -15,42 +15,20 @@
 package com.google.cloud.bigquery.samples;
 
 // [START all]
-import com.google.api.client.auth.oauth2.Credential;
-import com.google.api.client.extensions.java6.auth.oauth2.AuthorizationCodeInstalledApp;
-import com.google.api.client.extensions.jetty.auth.oauth2.LocalServerReceiver;
-import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeFlow;
-import com.google.api.client.googleapis.auth.oauth2.GoogleAuthorizationCodeRequestUrl;
-import com.google.api.client.googleapis.auth.oauth2.GoogleClientSecrets;
 import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
-import com.google.api.client.googleapis.auth.oauth2.GoogleTokenResponse;
 import com.google.api.client.http.HttpTransport;
 import com.google.api.client.http.javanet.NetHttpTransport;
 import com.google.api.client.json.JsonFactory;
 import com.google.api.client.json.jackson2.JacksonFactory;
-import com.google.api.client.util.store.DataStoreFactory;
-import com.google.api.client.util.store.FileDataStoreFactory;
-import com.google.api.services.bigquery.Bigquery.Datasets;
-import com.google.api.services.bigquery.Bigquery.Jobs.Insert;
 import com.google.api.services.bigquery.Bigquery;
 import com.google.api.services.bigquery.BigqueryScopes;
-import com.google.api.services.bigquery.model.DatasetList;
 import com.google.api.services.bigquery.model.GetQueryResultsResponse;
-import com.google.api.services.bigquery.model.Job;
-import com.google.api.services.bigquery.model.JobConfiguration;
-import com.google.api.services.bigquery.model.JobConfigurationQuery;
-import com.google.api.services.bigquery.model.JobReference;
 import com.google.api.services.bigquery.model.QueryRequest;
 import com.google.api.services.bigquery.model.QueryResponse;
 import com.google.api.services.bigquery.model.TableCell;
 import com.google.api.services.bigquery.model.TableRow;
 
-import java.io.BufferedReader;
-import java.io.FileInputStream;
 import java.io.IOException;
-import java.io.InputStream;
-import java.io.InputStreamReader;
-import java.io.Reader;
-import java.util.Arrays;
 import java.util.List;
 import java.util.Scanner;
 

google-checks.xml

@@ -30,6 +30,7 @@
         </module>
 
     <module name="TreeWalker">
+        <module name="UnusedImports"/>
         <module name="OuterTypeFilename"/>
         <module name="IllegalTokenText">
             <property name="tokens" value="STRING_LITERAL, CHAR_LITERAL"/>