contribute javadoc to a method in android/GT_APP/app/src/main/java/com/tencent/wstt/gt/log/logcat/SaveLogHelper.java

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Hi there, when I was reading the code of the function "public static File getFile(String filename)" in android/GT_APP/app/src/main/java/com/tencent/wstt/gt/log/logcat/SaveLogHelper.java, I found it has no Javadoc. I would like to contribute by adding “returns the file of the file located of the given file system.@param filename the new file". Can you please check if this is correct? Thanks.