Fix stream closing

Change-Id: I9c837a3e62d7834922ab0c191590875359a69441
Issue-ID: AAI-1358
Signed-off-by: Bogumil Zebek <bogumil.zebek@nokia.com>

5 files changed, 35 insertions, 60 deletions

diff --git a/aai-core/src/main/java/org/onap/aai/restcore/util/GenerateEdgeRules.java b/aai-core/src/main/java/org/onap/aai/restcore/util/GenerateEdgeRules.java
index afbcf337..4884f400 100644
--- a/aai-core/src/main/java/org/onap/aai/restcore/util/GenerateEdgeRules.java
+++ b/aai-core/src/main/java/org/onap/aai/restcore/util/GenerateEdgeRules.java
@@ -140,42 +140,13 @@ public class GenerateEdgeRules {
 
             Configuration configuration = new Configuration();
             Template template = configuration.getTemplate("src/main/resources/edgerulesTemplate.ftlh");
-            Writer file = new FileWriter(new File("src/main/resources/EdgeRulesWithNewLabels_v12.json"));
-            Map<String, List<EdgeRuleBean>> wrappedRules = new HashMap<>();
-    		wrappedRules.put("wrappedRules", rulesToWriteV12);
-    		template.process(wrappedRules, file);
-    		file.close();
-
-    		file = new FileWriter(new File("src/main/resources/EdgeRulesWithNewLabels_v7.json"));
-            wrappedRules = new HashMap<>();
-       		wrappedRules.put("wrappedRules", rulesToWriteV7);
-       		template.process(wrappedRules, file);
-       		file.close();
-
-    		file = new FileWriter(new File("src/main/resources/EdgeRulesWithNewLabels_v8.json"));
-            wrappedRules = new HashMap<>();
-       		wrappedRules.put("wrappedRules", rulesToWriteV8);
-       		template.process(wrappedRules, file);
-       		file.close();
-
-
-    		file = new FileWriter(new File("src/main/resources/EdgeRulesWithNewLabels_v9.json"));
-            wrappedRules = new HashMap<>();
-       		wrappedRules.put("wrappedRules", rulesToWriteV9);
-       		template.process(wrappedRules, file);
-       		file.close();
-
-    		file = new FileWriter(new File("src/main/resources/EdgeRulesWithNewLabels_v10.json"));
-            wrappedRules = new HashMap<>();
-       		wrappedRules.put("wrappedRules", rulesToWriteV10);
-       		template.process(wrappedRules, file);
-       		file.close();
-
-    		file = new FileWriter(new File("src/main/resources/EdgeRulesWithNewLabels_v11.json"));
-            wrappedRules = new HashMap<>();
-       		wrappedRules.put("wrappedRules", rulesToWriteV11);
-       		template.process(wrappedRules, file);
-       		file.close();
+
+            saveRulesIntoTheFile("src/main/resources/EdgeRulesWithNewLabels_v12.json", template, rulesToWriteV12);
+            saveRulesIntoTheFile("src/main/resources/EdgeRulesWithNewLabels_v7.json", template, rulesToWriteV7);
+            saveRulesIntoTheFile("src/main/resources/EdgeRulesWithNewLabels_v8.json", template, rulesToWriteV8);
+            saveRulesIntoTheFile("src/main/resources/EdgeRulesWithNewLabels_v9.json", template, rulesToWriteV9);
+            saveRulesIntoTheFile("src/main/resources/EdgeRulesWithNewLabels_v10.json", template, rulesToWriteV10);
+            saveRulesIntoTheFile("src/main/resources/EdgeRulesWithNewLabels_v11.json", template, rulesToWriteV11);
 
         } catch(Exception ex){
             ex.printStackTrace();
@@ -184,6 +155,17 @@ public class GenerateEdgeRules {
 
     }
 
+    private static void saveRulesIntoTheFile(String filePath, Template fileTemplate, List<EdgeRuleBean> rulesToWrite)
+        throws IOException, TemplateException {
+
+
+        try (Writer file = new FileWriter(new File(filePath))) {
+            Map<String, List<EdgeRuleBean>> wrappedRules = new HashMap<>();
+            wrappedRules.put("wrappedRules", rulesToWrite);
+            fileTemplate.process(wrappedRules, file);
+        }
+    }
+
     private static Map<String, Integer> retrieveHeaderMap(String line){
 
         if(line == null)
diff --git a/aai-core/src/main/java/org/onap/aai/util/AAIConfig.java b/aai-core/src/main/java/org/onap/aai/util/AAIConfig.java
index d1b21634..505e9940 100644
--- a/aai-core/src/main/java/org/onap/aai/util/AAIConfig.java
+++ b/aai-core/src/main/java/org/onap/aai/util/AAIConfig.java
@@ -143,8 +143,7 @@ public class AAIConfig {
         
         LOGGER.debug("Reloading config from " + propFileName);
         
-        try {
-            InputStream is = new FileInputStream(propFileName);
+        try(InputStream is = new FileInputStream(propFileName)){
             newServerProps = new Properties();
             newServerProps.load(is);
             propsInitialized = true;
diff --git a/aai-core/src/main/java/org/onap/aai/util/HttpsAuthExternalClient.java b/aai-core/src/main/java/org/onap/aai/util/HttpsAuthExternalClient.java
index 84aa6903..888b04f2 100644
--- a/aai-core/src/main/java/org/onap/aai/util/HttpsAuthExternalClient.java
+++ b/aai-core/src/main/java/org/onap/aai/util/HttpsAuthExternalClient.java
@@ -119,11 +119,12 @@ public class HttpsAuthExternalClient {
 			
 			String alg = TrustManagerFactory.getDefaultAlgorithm();
 			TrustManagerFactory tmf = TrustManagerFactory.getInstance(alg);
-			FileInputStream tin = new FileInputStream(truststore_path);
-			KeyStore ts = KeyStore.getInstance("PKCS12");
-			char[] tpwd = truststore_password.toCharArray();
-			ts.load(tin, tpwd);
-			tmf.init(ts);
+			try(FileInputStream tin = new FileInputStream(truststore_path)) {
+				KeyStore ts = KeyStore.getInstance("PKCS12");
+				char[] tpwd = truststore_password.toCharArray();
+				ts.load(tin, tpwd);
+				tmf.init(ts);
+			}
 	
 			//ctx.init(kmf.getKeyManagers(), tmf.getTrustManagers(), null);
 			// Updating key manager to null, to disable two way SSL
diff --git a/aai-core/src/main/java/org/onap/aai/util/genxsd/PutRelationPathSet.java b/aai-core/src/main/java/org/onap/aai/util/genxsd/PutRelationPathSet.java
index 3e411946..ca5a6fa7 100644
--- a/aai-core/src/main/java/org/onap/aai/util/genxsd/PutRelationPathSet.java
+++ b/aai-core/src/main/java/org/onap/aai/util/genxsd/PutRelationPathSet.java
@@ -117,26 +117,25 @@ public class PutRelationPathSet {
 		}
 	}
 	private void writeRelationsFile() {
-		File examplefilePath = new File(GenerateXsd.getYamlDir() + "/relations/" + version.name()+"/"+opId.replace("RelationshipListRelationship", "") + ".json");
 
-		logger.debug(String.join("exampleFilePath: ", examplefilePath.toString()));
-		FileOutputStream fop = null;
+		File exampleFilePath = new File(GenerateXsd.getYamlDir() + "/relations/" + version.name()+"/"+opId.replace("RelationshipListRelationship", "") + ".json");
+		logger.debug(String.join("exampleFilePath: ", exampleFilePath.toString()));
+
 		try {
-			if (!examplefilePath.exists()) {
-				examplefilePath.getParentFile().mkdirs();
-				examplefilePath.createNewFile();
+			if (!exampleFilePath.exists()) {
+				exampleFilePath.getParentFile().mkdirs();
+				exampleFilePath.createNewFile();
 			}
-			fop = new FileOutputStream(examplefilePath);
 		} catch(Exception e) {
 			e.printStackTrace();
 			return;
 		}
-		try {
+
+		try(FileOutputStream fop = new FileOutputStream(exampleFilePath)){
 			if(relations.size() > 0) {fop.write("[\n".getBytes());}
 			fop.write(String.join(",\n", relations).getBytes());
 			if(relations.size() > 0) {fop.write("\n]\n".getBytes());}
 			fop.flush();
-			fop.close();
 		} catch (Exception e) {
 			e.printStackTrace();
 			return;
diff --git a/aai-core/src/main/java/org/onap/aai/util/genxsd/YAMLfromOXM.java b/aai-core/src/main/java/org/onap/aai/util/genxsd/YAMLfromOXM.java
index ce5406a6..da3855c3 100644
--- a/aai-core/src/main/java/org/onap/aai/util/genxsd/YAMLfromOXM.java
+++ b/aai-core/src/main/java/org/onap/aai/util/genxsd/YAMLfromOXM.java
@@ -447,15 +447,9 @@ public class YAMLfromOXM extends OxmFileProcessor {
 			logger.error( "Exception creating output file " + outfileName);
 			e.printStackTrace();
 		}
-		BufferedWriter bw = null;
-		try {
-			Charset charset = Charset.forName("UTF-8");
-			Path path = Paths.get(outfileName);
-			bw = Files.newBufferedWriter(path, charset);
+
+		try(BufferedWriter bw = Files.newBufferedWriter(Paths.get(outfileName),  Charset.forName("UTF-8"))){
 			bw.write(fileContent);
-			if ( bw != null ) {
-				bw.close();
-			}
 		} catch ( IOException e) {
 			logger.error( "Exception writing output file " + outfileName);
 			e.printStackTrace();