google code style: http://google.github.io/styleguide/javaguide.html

checkstyle captured from here, on September 15, 2019: https://github.com/checkstyle/checkstyle/blob/master/src/main/resources/google_checks.xml

then modify for line length and indents per onap, here: https://wiki.onap.org/display/DW/Java+code+style

The latest version of the Eclipse Checkstyle Plugin drags in a new incompatible version of checkstyle, so we need to update the checkstyle version. See the wiki page below for details on how to upgrade Checkstyle.

https://wiki.onap.org/display/DW/How+to+update+ONAP+checkstyle+when+Checkstyle+steps+their+version