Using Closable.

...le/truffle/r/test/packages/analyzer/FileLineIterator.java

.../truffle/r/test/packages/analyzer/FileLineListReader.java

...acle/truffle/r/test/packages/analyzer/FileLineReader.java

...ruffle/r/test/packages/analyzer/FileLineStreamReader.java

...oracle/truffle/r/test/packages/analyzer/LineIterator.java

...t/packages/analyzer/detectors/ConfigureErrorDetector.java

.../truffle/r/test/packages/analyzer/detectors/Detector.java

...kages/analyzer/detectors/InstallationProblemDetector.java

...le/r/test/packages/analyzer/detectors/RErrorDetector.java

...t/packages/analyzer/detectors/RInternalErrorDetector.java

.../r/test/packages/analyzer/detectors/SegfaultDetector.java

...ackages/analyzer/detectors/SymbolLookupErrorDetector.java

...analyzer/detectors/UnsupportedSpecializationDetector.java

...ruffle/r/test/packages/analyzer/parser/LogFileParser.java