Create a plugin project and import as Eclipse project(using m2eclipse).
First, build is sucess.
But cause error when "mvn clean".

C:\XXXX>mvn clean
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Building Unnamed - testing:testing:hpi:1.0-SNAPSHOT
[INFO] task-segment: [clean]
[INFO] ------------------------------------------------------------------------
[INFO] [clean:clean

]
[INFO] Deleting C:\Projects\Tools\testing\target
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Failed to clean project: Failed to delete C:\XXXX\target\jenkins-for-test\images\TangoProject-L
icense.url

I cant delete TangoProject-Lcense.url file ...