File management (read write) functions
File list:
FFile
....\build
....\.....\classes
....\.....\.......\ffile
....\.....\.......\.....\FFile$1.class
....\.....\.......\.....\FFile.class
....\.....\.......\.....\FFileReader.class
....\.....\.......\.....\FFileWriter.class
....\.....\.......\.....\Main.class
....\.....\.......\.netbeans_automatic_build
....\.....\.......\.netbeans_update_resources
....\.....\empty
....\.....\generated-sources
....\.....\.................\ap-source-output
....\.....\built-jar.properties
....\dist
....\....\FFile.jar
....\....\README.TXT
....\nbproject
....\.........\private
....\.........\.......\config.properties
....\.........\.......\private.properties
....\.........\.......\private.xml
....\.........\build-impl.xml
....\.........\genfiles.properties
....\.........\project.properties
....\.........\project.xml
....\src
....\...\ffile
....\...\.....\FFile.java
....\...\.....\FFileReader.java
....\...\.....\FFileWriter.java
....\...\.....\Main.java
....\test
....\1_10000.txt
....\ansi.txt
....\binario.dat
....\build.xml
....\FFile.jar
....\manifest.mf
....\palabras_vacias_mano.txt
....\prueba.txt
....\prueba11.txt
....\prueba2.txt
....\prueba_ansi.txt
....\prueba_utf.txt
....\prueba_utf2.txt
....\utf8.txt