Bug 21183 Class javadoc created during "New Class" operation doesn't fill in variables properly [javadoc] [code manipulation]
If you use the enclosing_type variable in your javadoc comment template, it is not properly filled in when you make a new class (using the New Class dialog). Probably the class should be created, then after creating and saving, javadoc should be added. I suspect the variables don't have valid values yet at the time the javadoc is prepended to the class.
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/javadoc/JavaDocAutoIndentStrategy.java
private final String fString;
		private final BreakIterator fIterator= BreakIterator.getLineInstance();
				
		private int fStart;
		private int fEnd;
		private int fBufferedEnd;
		
		public LineBreakIterator(String string) {
			fString= string;
			fIterator.setText(string);
		}
		
		public int first() {
			fBufferedEnd= -1;
			fStart= fIterator.first();
			return fStart;	
		}
		
		public int next() {