Cold Fusion Close File cfscript

Question

This should be simple, but how do I close and release the file opened with this

<cfscript>
    FileName="C:\category1.txt";
    FileIOClass=createObject("java","java.io.FileReader");
    FileIO=FileIOClass.init(FileName);
    LineIOClass=createObject("java","java.io.BufferedReader" );
    LineIO=LineIOClass.init(FileIO);
</cfscript>
<cffile action = "delete" file = "C:\category1.txt">

ColdFusion could not delete the file C:\category1.txt for an unknown reason