carlspring/derby-maven-plugin — pull request #5 by denisa (2013-07-25 01:25:15+00:00)
Title: Truly shutdowns the embedded driver.

at least in my template project, getConnectionURL() is not set.
The call to
DriverManager.getConnection(getConnectionURL());
throws an NPE and the call to
DriverManager.getConnection("jdbc:derby:;shutdown=true");
never happens, leaving the driver active in the JVM.