Fix some statically detected code issues

This includes: unnecessary semicolons, suppress warnings, switch statements, final/private qualifiers, Optional wrapping, conditionals, both inline and non-inline variables, ternaries, Collection putAll() calls, StringBuilders, and throws declarations.

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=244182539

java/google/registry/tools/BigqueryParameters.java

@@ -53,13 +53,11 @@ final class BigqueryParameters {
 
   /** Returns a new BigqueryConnection constructed according to the delegate's flag settings. */
   BigqueryConnection newConnection(BigqueryConnection.Builder connectionBuilder) throws Exception {
-    BigqueryConnection connection =
-        connectionBuilder
-            .setExecutorService(Executors.newFixedThreadPool(bigqueryNumThreads))
-            .setDatasetId(bigqueryDataset)
-            .setOverwrite(bigqueryOverwrite)
-            .setPollInterval(bigqueryPollInterval)
-            .build();
-    return connection;
+    return connectionBuilder
+        .setExecutorService(Executors.newFixedThreadPool(bigqueryNumThreads))
+        .setDatasetId(bigqueryDataset)
+        .setOverwrite(bigqueryOverwrite)
+        .setPollInterval(bigqueryPollInterval)
+        .build();
   }
 }