Refactoring the code

src/main/java/org/leolo/nrdatad/db/mariadb/CorpusDaoImpl.java

@@ -11,11 +11,11 @@ import org.leolo.nrdatad.model.Corpus;
 import java.sql.*;
 import java.util.*;
 
-public class CorpusDao extends org.leolo.nrdatad.db.CorpusDao {
+public class CorpusDaoImpl extends org.leolo.nrdatad.db.CorpusDao {
 
     Logger log = LogManager.getLogger();
 
-    public CorpusDao(DatabaseManager manager) {
+    public CorpusDaoImpl(DatabaseManager manager) {
         super(manager);
     }
 

src/main/java/org/leolo/nrdatad/db/mariadb/DatabaseManager.java

@@ -65,16 +65,16 @@ public class DatabaseManager implements org.leolo.nrdatad.db.DatabaseManager{
 
     @Override
     public MetadataDao getMetadataDao() {
-        return new org.leolo.nrdatad.db.mariadb.MetadataDao(this);
+        return new MetadataDaoImpl(this);
     }
 
     @Override
     public CorpusDao getCORPUSDao() {
-        return new org.leolo.nrdatad.db.mariadb.CorpusDao(this);
+        return new CorpusDaoImpl(this);
     }
 
     @Override
     public SmartDao getSmartDao() {
-        return new org.leolo.nrdatad.db.mariadb.SmartDao(this);
+        return new SmartDaoImpl(this);
     }
 }

src/main/java/org/leolo/nrdatad/db/mariadb/MetadataDaoImpl.java

@@ -8,11 +8,11 @@ import java.util.Set;
 import java.util.TreeMap;
 import java.util.function.BiConsumer;
 
-public class MetadataDao extends org.leolo.nrdatad.db.MetadataDao {
+public class MetadataDaoImpl extends org.leolo.nrdatad.db.MetadataDao {
 
     private static Object SYNC_TOKEN = new Object();
 
-    public MetadataDao(DatabaseManager manager){
+    public MetadataDaoImpl(DatabaseManager manager){
         super(manager);
     }
 

src/main/java/org/leolo/nrdatad/db/mariadb/SmartDaoImpl.java

@@ -14,10 +14,10 @@ import java.sql.*;
 import java.util.Collection;
 import java.util.Vector;
 
-public class SmartDao extends org.leolo.nrdatad.db.SmartDao {
+public class SmartDaoImpl extends org.leolo.nrdatad.db.SmartDao {
     Logger log = LogManager.getLogger();
 
-    public SmartDao(DatabaseManager manager) {
+    public SmartDaoImpl(DatabaseManager manager) {
         super(manager);
     }