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This compliant solution uses a try-with-resources statement which will pass on not suppress any exception exceptions thrown during the processing of the input while still guaranteeing that br is closed.

String inPath = ...; // input file path

try (
      BufferedReader br = new BufferedReader(new FileReader(inPath));
    ) {
  // process the input and produce the output

} catch (IOException ex) {
  System.err.println("thrown exception: " + ex.toString());
  Throwable[] suppressed = ex.getSuppressed();
  for (int i = 0; i < suppressed.length; i++) {
    System.err.println("suppressed exception: "
        + suppressed[i].toString());
  }
}

If only one exception is thrown, either during opening, processing, or closing of the file, it will be printed by the "thrown exception: " statement. If an exception is thrown during processing, and another one is thrown while trying to close the file, then the "thrown exception: " statement will print the exception encountered while closing the file, and the "suppressed exception: " statement will print the exception encountered during processing.

Applicability

Failing to use a try-with-resources statement when dealing with closeable resources may result in some resources not being closed, or important exceptions being masked, possibly resulting in a denial of service attack.

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