Fix codacy issues

Author: Christian Mötzing

src/main/java/com/tagtraum/perf/gcviewer/imp/DataReaderIBM_J9_R28.java

@@ -77,15 +77,15 @@ public GCModel read() throws IOException {
                                 break;
                             case SYS_START:
                                 assert eventNameStart == null : "eventNameStart was expected to be null, but was " + eventNameStart;
-                                eventNameStart = handleSysStart(eventReader, startElement);
+                                eventNameStart = handleSysStart(startElement);
                                 break;
                             case AF_START:
                                 assert eventNameStart == null : "eventNameStart was expected to be null, but was " + eventNameStart;
-                                eventNameStart = handleAfStart(eventReader, startElement);
+                                eventNameStart = handleAfStart();
                                 break;
                             case CONCURRENT_COLLECTION_START:
                                 assert eventNameStart == null : "eventNameStart was expected to be null, but was " + eventNameStart;
-                                eventNameStart = handleConcurrentCollectionStart(eventReader, startElement);
+                                eventNameStart = handleConcurrentCollectionStart();
                                 break;
                             case GC_START:
                                 handleGcStart(eventReader, startElement, currentGcEvent, eventNameStart);
@@ -176,16 +176,16 @@ private void handleExclusiveEnd(StartElement startElement, GCEvent event) {
         event.setPause(NumberParser.parseDouble(getAttributeValue(startElement, "durationms")) / 1000);
     }
 
-    private String handleSysStart(XMLEventReader eventReader, StartElement startElement) throws XMLStreamException {
+    private String handleSysStart(StartElement startElement) {
         String reason = getAttributeValue(startElement, "reason");
         return "sys " + (reason != null ? reason + " " : "");
     }
 
-    private String handleAfStart(XMLEventReader eventReader, StartElement startElement) throws XMLStreamException {
+    private String handleAfStart() {
         return "af ";
     }
 
-    private String handleConcurrentCollectionStart(XMLEventReader eventReader, StartElement startElement) {
+    private String handleConcurrentCollectionStart() {
         return "concurrent-collection-start ";
     }
 

src/test/java/com/tagtraum/perf/gcviewer/imp/TestDataReaderIBM_J9_R27.java

@@ -1,7 +1,7 @@
 package com.tagtraum.perf.gcviewer.imp;
 
 import static com.tagtraum.perf.gcviewer.UnittestHelper.toKiloBytes;
-import static com.tagtraum.perf.gcviewer.imp.TestDataReaderIBM_J9_R28.*;
+import static com.tagtraum.perf.gcviewer.imp.TestDataReaderIBM_J9_R28.verifyTimestamp;
 import static org.hamcrest.Matchers.is;
 import static org.hamcrest.Matchers.startsWith;
 import static org.hamcrest.number.IsCloseTo.closeTo;

src/test/java/com/tagtraum/perf/gcviewer/imp/TestDataReaderIBM_J9_R28.java

@@ -15,7 +15,12 @@
 
 import com.tagtraum.perf.gcviewer.UnittestHelper;
 import com.tagtraum.perf.gcviewer.UnittestHelper.FOLDER;
-import com.tagtraum.perf.gcviewer.model.*;
+import com.tagtraum.perf.gcviewer.model.AbstractGCEvent;
+import com.tagtraum.perf.gcviewer.model.GCEvent;
+import com.tagtraum.perf.gcviewer.model.GCModel;
+import com.tagtraum.perf.gcviewer.model.GcResourceFile;
+import com.tagtraum.perf.gcviewer.model.GCResource;
+
 import org.junit.Test;
 
 /**