Possible instances of Channel opened but not safely closed

[timveil]

found three possible instances of a Channel being opened but not properly closed. this could lead to resource leaks.

for example, this...

try (RandomAccessFile randomAccessFile = new RandomAccessFile(file, "r")) {
  ...
  randomAccessFile.getChannel().read(duplicate, srcOffset);
}

should really be this...

try (RandomAccessFile randomAccessFile = new RandomAccessFile(file, "r");
    FileChannel channel = randomAccessFile.getChannel()) {
  ...
  channel.read(duplicate, srcOffset);
}