diff --git a/Files.cabal b/Files.cabal
--- a/Files.cabal
+++ b/Files.cabal
@@ -1,5 +1,5 @@
 name:                Files
-version:             0.1.1.0
+version:             0.1.1.1
 synopsis:            File content extraction/rearrangement
 description:         Please see README.md
 homepage:            https://github.com/yuhangwang/Files#readme
@@ -11,6 +11,9 @@
 category:            IO
 build-type:          Simple
 cabal-version:       >=1.10
+data-dir:           data
+data-files:         in/*.txt
+                  , out/*.txt
 
 executable Files
   hs-source-dirs:      src
@@ -26,6 +29,7 @@
     build-depends: base >= 4.7 && < 5
     ghc-options: -Wall
     default-language: Haskell2010
+
 
 test-suite hspec
     build-depends: base, Files, hspec
diff --git a/data/in/f1.txt b/data/in/f1.txt
new file mode 100644
--- /dev/null
+++ b/data/in/f1.txt
@@ -0,0 +1,3 @@
+a
+b
+c
diff --git a/data/in/f2.txt b/data/in/f2.txt
new file mode 100644
--- /dev/null
+++ b/data/in/f2.txt
@@ -0,0 +1,3 @@
+1
+2
+3
diff --git a/data/out/try1.txt b/data/out/try1.txt
new file mode 100644
--- /dev/null
+++ b/data/out/try1.txt
@@ -0,0 +1,6 @@
+a
+b
+c
+1
+2
+3