diff --git a/ChangeLog.md b/ChangeLog.md
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--- /dev/null
+++ b/ChangeLog.md
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+# Revision history for mmsyn3
+
+## 0.1.0.0 -- YYYY-mm-dd
+
+* First version. Released on an unsuspecting world.
diff --git a/EndOfExe.hs b/EndOfExe.hs
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--- /dev/null
+++ b/EndOfExe.hs
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+module EndOfExe where
+
+import qualified System.Directory as D (findExecutable)
+import Data.Maybe (isJust)
+import System.IO.Unsafe (unsafePerformIO)
+
+-- | Function that is used instead of System.Info.os to check whether the executable ends in .exe
+endOfExecutable :: String -> IO String                              
+endOfExecutable ys = do
+                       xs <- D.findExecutable ys
+                       if isJust xs 
+                         then return ""
+                         else do
+                                zs <- D.findExecutable (ys ++ ".exe")
+                                if isJust zs
+                                  then return ".exe"
+                                  else error ("Please, install the executable " ++ ys ++ " into the directory in the PATH variable!")
+                                  
+-- | Function that is used to concat the endOfExecutable to the name of the program. You can use showE \"nameOfExecutable\" e. g. inside the System.Process.callCommand as the name of the executable
+showE :: String -> String
+showE xs | null xs = []
+         | otherwise = xs ++ unsafePerformIO (endOfExecutable xs)
diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
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+Copyright (c) 2019 OleksandrZhabenko
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+"Software"), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be included
+in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
diff --git a/Setup.hs b/Setup.hs
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--- /dev/null
+++ b/Setup.hs
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+import Distribution.Simple
+main = defaultMain
diff --git a/mmsyn3.cabal b/mmsyn3.cabal
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--- /dev/null
+++ b/mmsyn3.cabal
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+-- Initial mmsyn3.cabal generated by cabal init.  For further
+-- documentation, see http://haskell.org/cabal/users-guide/
+
+name:                mmsyn3
+version:             0.1.0.0
+synopsis:            A small library to deal with executable endings
+-- description:
+homepage:            http://hackage.haskell.org/package/mmsyn3
+license:             MIT
+license-file:        LICENSE
+author:              OleksandrZhabenko
+maintainer:          olexandr543@yahoo.com
+-- copyright:
+category:            System
+build-type:          Simple
+extra-source-files:  ChangeLog.md
+cabal-version:       >=1.10
+
+library
+  exposed-modules:     EndOfExe
+  -- other-modules:
+  -- other-extensions:
+  build-depends:       base >=4.11 && <4.13, directory >=1.3 && <1.4
+  -- hs-source-dirs:
+  default-language:    Haskell2010