use eager initialization instead of synchronized

Author: baltzell

common-tools/clas-detector/src/main/java/org/jlab/detector/swaps/SwapManager.java

@@ -56,7 +56,7 @@ public final class SwapManager {
     private ConstantsManager currConman = null;
     private SchemaFactory schema = null;
 
-    private static SwapManager instance = null;
+    private static SwapManager instance = new SwapManager();
 
     public Set<String> getDetectors() {
         return this.detsToBanks.keySet();
@@ -70,10 +70,7 @@ public List<String> getBanks(String detectorName) {
 
     private SwapManager() {}
 
-    public static synchronized SwapManager getInstance() {
-        if (instance == null) {
-            instance = new SwapManager();
-        }
+    public static SwapManager getInstance() {
         return instance;
     }