add es adapter

[UnderTreeTech]

#78

[codecov-io]

Codecov Report

Merging #79 (41542ec) into master (342803e) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master      #79   +/-   ##
=======================================
  Coverage   62.89%   62.89%           
=======================================
  Files          28       28           
  Lines         857      857           
=======================================
  Hits          539      539           
  Misses        270      270           
  Partials       48       48           

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