refactor: Added some raw types, checking for non-null resource before opening stream. #66
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Hi, I research yours code and decided to make changes a small defects by my own view). If it is ok for you then I will continue do it:)
Main of this changes is checking for non-null resource before opening stream to warns NPE and reports that is problem.
And com.google.common.base.Charsets is deprecated since jdk 7, better to use standard java java.nio.charset.StandardCharsets. Thx:)
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