Fix javadoc for module "mangling" (#396)

Also simplifies constructors.

Author: dr0i

metafacture-mangling/src/main/java/org/metafacture/mangling/ObjectToLiteral.java

@@ -37,14 +37,11 @@ public final class ObjectToLiteral<T> extends
     public static final String DEFAULT_LITERAL_NAME = "obj";
     public static final String DEFAULT_RECORD_ID = "";
 
-    private String literalName;
-    private String recordId;
+    private String literalName = DEFAULT_LITERAL_NAME;
+    private String recordId = DEFAULT_RECORD_ID;
     private int recordCount;
 
     public ObjectToLiteral() {
-        setLiteralName(DEFAULT_LITERAL_NAME);
-        setRecordId(DEFAULT_RECORD_ID);
-        recordCount = 0;
     }
 
     public void setLiteralName(final String literalName) {

metafacture-mangling/src/main/java/org/metafacture/mangling/RecordPathFilter.java

@@ -38,21 +38,23 @@ public final class RecordPathFilter extends DefaultStreamPipe<StreamReceiver> {
 
     private final EntityPathTracker entityPathTracker = new EntityPathTracker();
 
-    private String path;
-    private String recordIdFormat;
+    private String path = ROOT_PATH;
+    private String recordIdFormat = DEFAULT_RECORD_ID_FORMAT;
     private String recordIdentifier;
     private boolean inMatch;
     private boolean recordStarted;
     private int recordCount;
 
     public RecordPathFilter() {
-        this(ROOT_PATH);
     }
 
+    /**
+     * Constructs a RecordPathFilter with a given path.
+     *
+     * @param path the name of the path
+     */
     public RecordPathFilter(final String path) {
-        resetRecord();
         setPath(path);
-        setRecordIdFormat(DEFAULT_RECORD_ID_FORMAT);
     }
 
     public void setEntitySeparator(final String entitySeparator) {