Some issues when running the sample test.

[phandc]

trafficstars

Hello, I am new with Overflowdb. I have tried to create a Maven project to test Overflowdb in Intellij. But when I tried to copy "gratefuldead" folder from the test of source code to run, Intellij auto-detected some bugs such as: "incompatible types" and "require Hashset(object) ".