fix build errors

samples/src/test/java/com/example/bigquery/RelaxTableQueryIT.java

@@ -33,11 +33,11 @@
 public class RelaxTableQueryIT {
   private ByteArrayOutputStream bout;
   private PrintStream out;
-  private String tableName;
-  private Schema originalSchema;
 
   private static final String BIGQUERY_PROJECT_ID = System.getenv("BIGQUERY_PROJECT_ID");
   private static final String BIGQUERY_DATASET_NAME = System.getenv("BIGQUERY_DATASET_NAME");
+  private static final String TABLE_NAME =
+      "RELAX_TABLE_QUERY_TEST_" + UUID.randomUUID().toString().replace('-', '_');
 
   private static void requireEnvVar(String varName) {
     assertNotNull(
@@ -55,9 +55,10 @@ public static void checkRequirements() {
   public void setUp() throws Exception {
     bout = new ByteArrayOutputStream();
     out = new PrintStream(bout);
-    tableName =
-        "RELAX_TABLE_QUERY_TEST" + UUID.randomUUID().toString().substring(0, 5).replace('-', '_');
-    originalSchema =
+
+    CreateTable.createTable(
+        BIGQUERY_DATASET_NAME,
+        TABLE_NAME,
         Schema.of(
             Field.newBuilder("word", LegacySQLTypeName.STRING).setMode(Field.Mode.REQUIRED).build(),
             Field.newBuilder("word_count", LegacySQLTypeName.STRING)
@@ -68,20 +69,19 @@ public void setUp() throws Exception {
                 .build(),
             Field.newBuilder("corpus_date", LegacySQLTypeName.STRING)
                 .setMode(Field.Mode.REQUIRED)
-                .build());
-    CreateTable.createTable(BIGQUERY_DATASET_NAME, tableName, originalSchema);
+                .build()));
     System.setOut(out);
   }
 
   @After
   public void tearDown() {
-    DeleteTable.deleteTable(BIGQUERY_DATASET_NAME, tableName);
+    DeleteTable.deleteTable(BIGQUERY_DATASET_NAME, TABLE_NAME);
     System.setOut(null);
   }
 
   @Test
   public void testRelaxTableQuery() throws Exception {
-    RelaxTableQuery.relaxTableQuery(BIGQUERY_PROJECT_ID, BIGQUERY_DATASET_NAME, tableName);
+    RelaxTableQuery.relaxTableQuery(BIGQUERY_PROJECT_ID, BIGQUERY_DATASET_NAME, TABLE_NAME);
     assertThat(bout.toString())
         .contains("Successfully relaxed all columns in destination table during query job");
   }