Add failure analyzer for incorrect interface name

src/main/java/ru/serega6531/packmate/exception/analyzer/PcapInterfaceNotFoundFailureAnalyzer.java

@@ -0,0 +1,16 @@
+package ru.serega6531.packmate.exception.analyzer;
+
+import org.springframework.boot.diagnostics.AbstractFailureAnalyzer;
+import org.springframework.boot.diagnostics.FailureAnalysis;
+import ru.serega6531.packmate.exception.PcapInterfaceNotFoundException;
+
+public class PcapInterfaceNotFoundFailureAnalyzer extends AbstractFailureAnalyzer<PcapInterfaceNotFoundException> {
+    @Override
+    protected FailureAnalysis analyze(Throwable rootFailure, PcapInterfaceNotFoundException cause) {
+        return new FailureAnalysis(
+                "The interface \"" + cause.getRequestedInterface() + "\" was not found",
+                "Check the interface name in the config. Existing interfaces are: " + cause.getExistingInterfaces(),
+                cause
+        );
+    }
+}