Polish "Use try-with-resources to close resources automatically"

- Apply code formatting
- Use try-with-resources in many other places that were missed in the
  pull request

Closes gh-8045

spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationprocessor/ConfigurationMetadataAnnotationProcessorTests.java

@@ -815,13 +815,9 @@ public class ConfigurationMetadataAnnotationProcessorTests {
 	}
 
 	private void writeMetadata(File metadataFile, JSONObject metadata) throws Exception {
-		FileWriter writer = new FileWriter(metadataFile);
-		try {
+		try (FileWriter writer = new FileWriter(metadataFile)) {
 			writer.append(metadata.toString(2));
 		}
-		finally {
-			writer.close();
-		}
 	}
 
 	private static class AdditionalMetadata {