Tidy some w3c imports; was causing compile issues in Eclipse+Java10.

prism/src/prism/MathML2Prism.java

@@ -29,7 +29,9 @@ package prism;
 import java.io.*;
 import java.util.*;
 import javax.xml.parsers.*;
-import org.w3c.dom.*;
+import org.w3c.dom.Document;
+import org.w3c.dom.Node;
+import org.w3c.dom.NodeList;
 import org.xml.sax.*;
 
 public class MathML2Prism

prism/src/simulator/networking/SimulatorNetworkHandler.java

@@ -31,7 +31,10 @@ import javax.xml.parsers.*;
 import javax.xml.transform.*;
 import javax.xml.transform.dom.*;
 import javax.xml.transform.stream.*;
-import org.w3c.dom.*;
+import org.w3c.dom.DOMException;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.NodeList;
 import org.xml.sax.SAXException;
 import org.xml.sax.EntityResolver;
 import org.xml.sax.InputSource;

prism/src/userinterface/GUIGeneralOptions.java

@@ -30,7 +30,9 @@ package userinterface;
 import javax.swing.plaf.metal.*;
 import javax.swing.*;
 import userinterface.util.*;
-import org.w3c.dom.*;
+import org.w3c.dom.DOMException;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
 
 import userinterface.OptionsPanel;
 

prism/src/userinterface/GUINetworkOptions.java

@@ -29,7 +29,9 @@ package userinterface;
 import userinterface.util.*;
 
 import java.util.*;
-import org.w3c.dom.*;
+import org.w3c.dom.DOMException;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
 
 public class GUINetworkOptions extends OptionsPanel
 {

prism/src/userinterface/graph/AxisSettings.java

@@ -45,7 +45,7 @@ import org.jfree.chart.axis.*;
 import org.jfree.data.*;
 import org.jfree.data.xy.*;
 
-import org.w3c.dom.*;
+import org.w3c.dom.Element;
 
 /**
  * Representation of an axis of a Graph.

prism/src/userinterface/graph/Graph.java

@@ -35,7 +35,10 @@ import java.io.*;
 import java.util.*;
 import java.awt.image.*;
 
-import org.w3c.dom.*;
+import org.w3c.dom.DOMException;
+import org.w3c.dom.Document;
+import org.w3c.dom.Element;
+import org.w3c.dom.NodeList;
 import org.xml.sax.*;
 
 import javax.xml.parsers.*;