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-samples/spring-boot-sample-custom-layout/src/test/java/sample/layout/Verify.java

@@ -27,8 +27,7 @@ public final class Verify {
 	}
 
 	public static void verify(File file, String entry) throws Exception {
-		ZipFile zipFile = new ZipFile(file);
-		try {
+		try (ZipFile zipFile = new ZipFile(file)) {
 			Enumeration<? extends ZipEntry> entries = zipFile.entries();
 			while (entries.hasMoreElements()) {
 				if (entries.nextElement().getName().equals(entry)) {
@@ -37,9 +36,6 @@ public final class Verify {
 			}
 			throw new AssertionError("No entry " + entry);
 		}
-		finally {
-			zipFile.close();
-		}
 	}
 
-}
+}