Update documentation regarding usage of EncodingManager's constructor (graphhopper#1594)

The constructor is private and you have to use the factory methods.

Author: Nakaner

docs/core/low-level-api.md

@@ -46,7 +46,7 @@ create new virtual nodes or if close enough use the existing junction node.
 
 ```java
 FlagEncoder encoder = new CarFlagEncoder();
-EncodingManager em = new EncodingManager(encoder);
+EncodingManager em = EncodingManager.create(encoder);
 GraphBuilder gb = new GraphBuilder(em).setLocation("graphhopper_folder").setStore(true);
 GraphStorage graph = gb.create();
 // Make a weighted edge between two nodes.

docs/core/routing.md

@@ -11,7 +11,7 @@ GraphHopper hopper = new GraphHopperOSM().forServer();
 hopper.setDataReaderFile(osmFile);
 // where to store graphhopper files?
 hopper.setGraphHopperLocation(graphFolder);
-hopper.setEncodingManager(new EncodingManager("car"));
+hopper.setEncodingManager(EncodingManager.create("car"));
 
 // now this can take minutes if it imports or a few seconds for loading
 // of course this is dependent on the area you import
@@ -60,7 +60,7 @@ config.yml `prepare.ch.weightings=no`) or on a per request base by adding `ch.di
 (see config.yml `prepare.lm.weightings=fastest`).
 
 If you need multiple vehicle profiles you can specify a list of vehicle profiles (see
-config.yml e.g. `graph.flag_encoders=car,bike` or use `new EncodingManager("car,bike")`). 
+config.yml e.g. `graph.flag_encoders=car,bike` or use `EncodingManager.create("car,bike")`). 
 
 To calculate a route you have to pick one vehicle and optionally an algorithm like `bidirectional_astar`:
 
@@ -69,7 +69,7 @@ GraphHopper hopper = new GraphHopperOSM().forServer();
 hopper.setCHEnabled(false);
 hopper.setOSMFile(osmFile);
 hopper.setGraphHopperLocation(graphFolder);
-hopper.setEncodingManager(new EncodingManager("car,bike"));
+hopper.setEncodingManager(EncodingManager.create("car,bike"));
 
 hopper.importOrLoad();