4792 document empty constructors

Core/src/org/sleuthkit/autopsy/centralrepository/contentviewer/OtherOccurrencesCasesTableModel.java

@@ -37,6 +37,7 @@ public class OtherOccurrencesCasesTableModel extends AbstractTableModel {
      * Create a table model for displaying case names
      */
     OtherOccurrencesCasesTableModel() {
+        // This constructor is intentionally empty.
     }
 
     @Override

Core/src/org/sleuthkit/autopsy/centralrepository/contentviewer/OtherOccurrencesDataSourcesTableModel.java

@@ -37,7 +37,7 @@ final class OtherOccurrencesDataSourcesTableModel extends AbstractTableModel {
      * Create a table model for displaying data source names
      */
     OtherOccurrencesDataSourcesTableModel() {
-
+        // This constructor is intentionally empty.
     }
 
     @Override

Core/src/org/sleuthkit/autopsy/centralrepository/contentviewer/OtherOccurrencesFilesTableModel.java

@@ -40,7 +40,7 @@ public class OtherOccurrencesFilesTableModel extends AbstractTableModel {
      * Create a table model for displaying file names
      */
     OtherOccurrencesFilesTableModel() {
-
+        // This constructor is intentionally empty.
     }
 
     @Override