import lombok.Cleanup; import java.io.*; class CleanupPlain { CleanupPlain() { super(); } void test() throws Exception { @lombok.Cleanup InputStream in = new FileInputStream("in"); try { @Cleanup OutputStream out = new FileOutputStream("out"); try { if (in.markSupported()) { out.flush(); } } finally { if ((java.util.Collections.singletonList(out).get(0) != null)) { out.close(); } } } finally { if ((java.util.Collections.singletonList(in).get(0) != null)) { in.close(); } } } }