callstack: Fix InstrumentedCallStackAnalysis warnings

Fix these few Eclipse warnings and add the missing following blank line.

Change-Id: I8dbf8df267cd44bf62a130d3f2967379d8899075
Signed-off-by: Marco Miller <marco.miller@ericsson.com>
Reviewed-on: https://git.eclipse.org/r/c/tracecompass.incubator/org.eclipse.tracecompass.incubator/+/192745
Tested-by: Trace Compass Bot <tracecompass-bot@eclipse.org>
Tested-by: Bernd Hufmann <bernd.hufmann@ericsson.com>
Tested-by: Matthew Khouzam <matthew.khouzam@ericsson.com>
Reviewed-by: Bernd Hufmann <bernd.hufmann@ericsson.com>
Reviewed-by: Matthew Khouzam <matthew.khouzam@ericsson.com>

callstack/org.eclipse.tracecompass.incubator.callstack.core/src/org/eclipse/tracecompass/incubator/callstack/core/instrumented/statesystem/InstrumentedCallStackAnalysis.java

@@ -75,7 +75,8 @@ public abstract class InstrumentedCallStackAnalysis extends TmfStateSystemAnalys
     /**
      * Listeners
      */
-    private final ListenerList fListeners = new ListenerList(ListenerList.IDENTITY);
+    private final ListenerList<IAnalysisProgressListener> fListeners = new ListenerList<>(ListenerList.IDENTITY);
+
     /*
      * Whether the callgraph execution will be triggered automatically after build
      */