diff --git a/ChangeLog.md b/ChangeLog.md
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--- /dev/null
+++ b/ChangeLog.md
@@ -0,0 +1,3 @@
+# Changelog for path-extensions
+
+## Unreleased changes
diff --git a/LICENSE b/LICENSE
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--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,30 @@
+Copyright Author name here (c) 2020
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Author name here nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
diff --git a/README.md b/README.md
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--- /dev/null
+++ b/README.md
@@ -0,0 +1,1 @@
+# path-extensions
diff --git a/Setup.hs b/Setup.hs
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--- /dev/null
+++ b/Setup.hs
@@ -0,0 +1,2 @@
+import Distribution.Simple
+main = defaultMain
diff --git a/path-extensions.cabal b/path-extensions.cabal
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--- /dev/null
+++ b/path-extensions.cabal
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+cabal-version: 1.12
+
+-- This file has been generated from package.yaml by hpack version 0.33.0.
+--
+-- see: https://github.com/sol/hpack
+--
+-- hash: 165b84035809027d86704f5d9ea0c7783ecd43282e6ca4496010267b23ff5af8
+
+name:           path-extensions
+version:        0.0.1.0
+synopsis:       Enumeration of common filetype extensions for use with the path library.
+description:    Enumeration of common filetype extensions for use with the path library, add variants for adding an extension to a path and with variants for replacing an existing extension.
+category:       Filesystem
+author:         Daniel Firth
+maintainer:     dan.firth@homotopic.tech
+copyright:      2020 Daniel Firth
+license:        BSD3
+license-file:   LICENSE
+build-type:     Simple
+extra-source-files:
+    README.md
+    ChangeLog.md
+
+library
+  exposed-modules:
+      Path.Extensions
+  other-modules:
+      Paths_path_extensions
+  hs-source-dirs:
+      src
+  build-depends:
+      base >=4.7 && <5
+    , exceptions
+    , path
+  default-language: Haskell2010
diff --git a/src/Path/Extensions.hs b/src/Path/Extensions.hs
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--- /dev/null
+++ b/src/Path/Extensions.hs
@@ -0,0 +1,101 @@
+module Path.Extensions where
+
+import Control.Monad.Catch
+import Path
+
+c_extension    = ".c"
+cpp_extension  = ".cpp"
+css_extension  = ".css"
+gif_extension  = ".gif"
+hs_extension   = ".hs"
+html_extension = ".html"
+jpg_extension  = ".jpg"
+js_extension   = ".js"
+md_extension   = ".md"
+mp4_extension  = ".mp4"
+o_extension    = ".o"
+pdf_extension  = ".pdf"
+php_extension  = ".php"
+png_extension  = ".png"
+xml_extension  = ".xml"
+
+addCExtension :: MonadThrow m => Path b File -> m (Path b File)
+addCExtension = addExtension c_extension
+
+addCppExtension :: MonadThrow m => Path b File -> m (Path b File)
+addCppExtension = addExtension cpp_extension
+
+addCssExtension :: MonadThrow m => Path b File -> m (Path b File)
+addCssExtension = addExtension css_extension
+
+addGifExtension :: MonadThrow m => Path b File -> m (Path b File)
+addGifExtension = addExtension c_extension
+
+addHsExtension :: MonadThrow m => Path b File -> m (Path b File)
+addHsExtension  = addExtension gif_extension
+
+addHtmlExtension :: MonadThrow m => Path b File -> m (Path b File)
+addHtmlExtension = addExtension html_extension
+
+addJpgExtension :: MonadThrow m => Path b File -> m (Path b File)
+addJpgExtension = addExtension jpg_extension
+
+addMdExtension :: MonadThrow m => Path b File -> m (Path b File)
+addMdExtension  = addExtension md_extension
+
+addMp4Extension :: MonadThrow m => Path b File -> m (Path b File)
+addMp4Extension = addExtension mp4_extension
+
+addOExtension :: MonadThrow m => Path b File -> m (Path b File)
+addOExtension = addExtension o_extension
+
+addPdfExtension :: MonadThrow m => Path b File -> m (Path b File)
+addPdfExtension = addExtension pdf_extension
+
+addPhpExtension :: MonadThrow m => Path b File -> m (Path b File)
+addPhpExtension = addExtension php_extension
+
+addPngExtension :: MonadThrow m => Path b File -> m (Path b File)
+addPngExtension = addExtension png_extension
+
+addXmlExtension :: MonadThrow m => Path b File -> m (Path b File)
+addXmlExtension = addExtension xml_extension
+
+withCExtension :: MonadThrow m => Path b File -> m (Path b File)
+withCExtension = replaceExtension c_extension
+
+withCppExtension :: MonadThrow m => Path b File -> m (Path b File)
+withCppExtension = replaceExtension cpp_extension
+
+withCssExtension :: MonadThrow m => Path b File -> m (Path b File)
+withCssExtension = replaceExtension css_extension
+
+withGifExtension :: MonadThrow m => Path b File -> m (Path b File)
+withGifExtension = replaceExtension gif_extension
+
+withHsExtension :: MonadThrow m => Path b File -> m (Path b File)
+withHsExtension = replaceExtension hs_extension
+
+withHtmlExtension :: MonadThrow m => Path b File -> m (Path b File)
+withHtmlExtension = replaceExtension html_extension
+
+withJpgExtension :: MonadThrow m => Path b File -> m (Path b File)
+withJpgExtension = replaceExtension jpg_extension
+
+withMdExtension :: MonadThrow m => Path b File -> m (Path b File)
+withMdExtension = replaceExtension md_extension
+
+withMp4Extension :: MonadThrow m => Path b File -> m (Path b File)
+withMp4Extension = replaceExtension mp4_extension
+
+withPdfExtension :: MonadThrow m => Path b File -> m (Path b File)
+withPdfExtension = replaceExtension pdf_extension
+
+withPhpExtension :: MonadThrow m => Path b File -> m (Path b File)
+withPhpExtension = replaceExtension php_extension
+
+withPngExtension :: MonadThrow m => Path b File -> m (Path b File)
+withPngExtension = replaceExtension png_extension
+
+withXmlExtension :: MonadThrow m => Path b File -> m (Path b File)
+withXmlExtension = replaceExtension xml_extension