Have you tried to install WTP's org.eclipse.jst.common.fproj.enablement.jdt.feature.patch from here?
http://download.eclipse.org/webtools/patches/drops/R3.5.2/P-3.5.2-20140329045715/repository
You might also want support for Java 8 in Maven, PDE, and JDT.
For those features, use these sites:
Maven (M2E) 1.4.1 (org.eclipse.m2e.feature) http://download.eclipse.org/technology/m2e/releases/1.4/1.4.1.20140328-1905
JDT & PDE Feature patches : http://download.eclipse.org/eclipse/updates/4.3-P-builds/
If you happen to be a fan of JBoss Tools, it's coming directly to JBoss Central: