How do install the WTP addin to my installation of Eclipse Juno?

Hi:

I have Eclipse Juno installed on my Linux Mint 16 VM.
I am trying to configure Eclipse so that I can develop/debug my JAVA/Spring backend/HTML5 front end application from within Eclipse.

I'm currently trying to install the Web Tools Platform (WTP SDK) 3.1.2 addins from within Eclipse --> Install Available Software.

I've run into the following issues:

Cannot complete the install because one or more required items could not be found.
  Software being installed: JST Enterprise Plug-in Developer Resources 3.1.1.v200908101600-771184eAHSuuJTW3Ue6ZhBIyV8tu (org.eclipse.jst.enterprise_sdk.feature.feature.group 3.1.1.v200908101600-771184eAHSuuJTW3Ue6ZhBIyV8tu)
  Missing requirement: J2EE Core Component 1.1.301.v200908181930 (org.eclipse.jst.j2ee.core 1.1.301.v200908181930) requires 'bundle com.ibm.icu [3.4.4,4.1.0)' but it could not be found
  Missing requirement: J2EE Core Component 1.1.301.v200911302230 (org.eclipse.jst.j2ee.core 1.1.301.v200911302230) requires 'bundle com.ibm.icu [3.4.4,4.1.0)' but it could not be found
  Cannot satisfy dependency:
    From: JST Enterprise Plug-in Developer Resources 3.1.1.v200908101600-771184eAHSuuJTW3Ue6ZhBIyV8tu (org.eclipse.jst.enterprise_sdk.feature.feature.group 3.1.1.v200908101600-771184eAHSuuJTW3Ue6ZhBIyV8tu)
    To: org.eclipse.jst.enterprise_ui.feature.feature.group [3.1.1.v200908101600-7_7EGrjFQRwRb4P511ebObS5XZhq]
  Cannot satisfy dependency:
    From: Eclipse Java EE Developer Tools 3.1.1.v200908101600-7_7EGrjFQRwRb4P511ebObS5XZhq (org.eclipse.jst.enterprise_ui.feature.feature.group 3.1.1.v200908101600-7_7EGrjFQRwRb4P511ebObS5XZhq)
    To: org.eclipse.jst.j2ee.ejb.annotations.xdoclet [1.2.0.v200805140020]
  Cannot satisfy dependency:
    From: Xdoclet Annotations Plug-in 1.2.0.v200805140020 (org.eclipse.jst.j2ee.ejb.annotations.xdoclet 1.2.0.v200805140020)
    To: bundle org.eclipse.jst.j2ee.core [1.1.0,1.2.0)

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1) How do I resolve the above issues?

2) To set up the debug environment form with Eclipse, do need to install both WTP and the WTP SDK?

Thanks in advance for your assistance.
JB