JDK 9 RFR of JDK-8043549: Fix raw and unchecked lint warnings in javax.swing.text.*

[Joe Darcy]

Hello,

Please review my proposed changes for

    JDK-8043549: Fix raw and unchecked lint warnings in javax.swing.text.*
    http://cr.openjdk.java.net/~darcy/8043549.0/

Thanks,

-Joe