added throws clause to initialize and close as specified by the interface

Former-commit-id: dca013ac170a09297bc5bbf96ee8fecc9d2baaef

src/main/java/org/owasp/dependencycheck/analyzer/AbstractAnalyzer.java

@@ -48,14 +48,14 @@ public abstract class AbstractAnalyzer implements Analyzer {
     /**
      * The initialize method does nothing for this Analyzer.
      */
-    public void initialize() {
+    public void initialize() throws Exception {
         //do nothing
     }
 
     /**
      * The close method does nothing for this Analyzer.
      */
-    public void close() {
+    public void close() throws Exception {
         //do nothing
     }
 }