Update CODEOWNERS (#30)

* Update CODEOWNERS

* Update dpc_common.hpp

* Update dpc_common.hpp

Author: anjgola

CODEOWNERS

@@ -4,5 +4,20 @@
 # the repo. Unless a later match takes precedence,
 # they will be requested for
 # review when someone opens a pull request.
-*       @JoeOster @anjgola @mkitez @pmpeter1 @tomlenth
+*       @JoeOster @pmpeter1 @tomlenth
 
+# This owner owns any files in the given
+# directory at the root of the repository and any of its
+# subdirectories.
+/DirectProgramming/DPC++/ @JoeOster @moushumi-maria, @pmpeter1
+/DirectProgramming/Jupyter/ @JoeOster @praveenkk123
+/DirectProgramming/C++/ @JoeOster @pmpeter1 @Propanu
+/DirectProgramming/Fortran/ @JoeOster @pmpeter1 @Propanu
+/Tools/ @JoeOster @Propanu
+/Libraries/ @JoeOster @Propanu @mav-intel @JoeOster
+
+# Reviwers for all sample.json modification 
+*sample.json @pfische1 @mkitez
+
+# Reviewer for all readme files
+*/README.md @tomlenth