add comments for CCN code

citationNetworkCompute/src/main/java/gov/nih/opa/ccn/common/MongoCited.java

@@ -31,9 +31,8 @@
 import static com.mongodb.client.model.Filters.lte;
 
 /**
- * Created by Matt Davis on 2/11/16.
- *
- * @author mdavis
+ * Base class for interacting with the mongo database of citations
+ * Use mongoURI property to set path to mongodb
  */
 public class MongoCited {
 

citationNetworkCompute/src/main/java/gov/nih/opa/ccn/common/NamedThreadFactory.java

@@ -4,6 +4,7 @@
 import java.util.concurrent.atomic.AtomicInteger;
 
 /**
+ * Helps name threading in a logical way for logging and debugging
  * Very similar to NamedThreadFactory in lucene but keeps the client from depending on lucene
  */
 public class NamedThreadFactory implements ThreadFactory {

citationNetworkCompute/src/main/java/gov/nih/opa/ccn/common/SimConfig.java

@@ -4,6 +4,7 @@
 import java.util.function.BiFunction;
 
 /**
+ * Generates a CSV output (header and individual lines) based on the settings selected
  * Created by mdavis on 6/27/17.
  */
 public class SimConfig {

citationNetworkCompute/src/main/java/gov/nih/opa/ccn/common/SparseVector.java

@@ -6,6 +6,9 @@
 import java.util.Map;
 import java.util.TreeMap;
 
+/**
+ * Handles high speed similarity computation from sparse vectors (cosine, jaccard, minSim) and difference computation
+ */
 public class SparseVector {
 
 	private final int id;