add start of the store operation

dstore/test.txt

dstore/test2.txt

dstore2/test.txt

dstore2/test2.txt

dstore2/test3.txt

dstore3/test.txt

dstore3/test2.txt

dstore3/test3.txt

dstore3/test4.txt

nioExampleFiles/AbstractTest.java

nioExampleFiles/Constants.java

nioExampleFiles/FileCopyTest.java

nioExampleFiles/FileReader.java

nioExampleFiles/FileReceiver.java

nioExampleFiles/FileSender.java

nioExampleFiles/FileWriter.java

src/ftp/Controller.java

src/ftp/Dstore.java

src/ftp/DstoreConnection.java

src/ftp/DstoreFile.java